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arith.cpp
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// Copyright (c) 2018-2025 Robert J. Hijmans
//
// This file is part of the "spat" library.
//
// spat is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// spat is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with spat. If not, see <http://www.gnu.org/licenses/>.
#include <functional>
#include "spatRasterMultiple.h"
#include "recycle.h"
#include "math_utils.h"
#include "vecmath.h"
#include <cmath>
#if defined(HAVE_TBB) && !defined(__APPLE__)
#include <tbb/parallel_for.h>
#include <tbb/blocked_range.h>
#endif
//#include "modal.h"
/*
// need to take care of NAs here. OK for NAN, but not for int types
//template <typename T>
//void operator+(std::vector<T>& a, const std::vector<T>& b) {
void operator+(std::vector<double>& a, const std::vector<double>& b) {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::plus<double>());
}
//template <typename T>
void operator-(std::vector<double>& a, const std::vector<double>& b) {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::minus<double>());
}
//template <typename T>
void operator/(std::vector<double>& a, const std::vector<double>& b) {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::divides<double>());
}
//template <typename T>
void operator*(std::vector<double>& a, const std::vector<double>& b) {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::multiplies<double>());
}
*/
inline double R_modulo(const double &x, const double &y) {
double m = std::fmod(x, y);
if (y < 0) {
if (m > 0) {
m += y;
}
} else if (m < 0) {
m += y;
}
return m;
}
//template <typename T>
void operator%(std::vector<double>& a, const std::vector<double>& b) {
// std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::modulus<T>());
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = R_modulo(a[i], b[i]);
}
}
}
//template <typename T>
void operator>=(std::vector<double>& a, const std::vector<double>& b) {
// std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::greater_equal<T>());
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = a[i] >= b[i];
}
}
}
//template <typename T>
void operator<=(std::vector<double>& a, const std::vector<double>& b) {
// std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::less_equal<T>());
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = a[i] <= b[i];
}
}
}
//template <typename T>
void operator>(std::vector<double>& a, const std::vector<double>& b) {
// std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::greater<T>());
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = a[i] > b[i];
}
}
}
//template <typename T>
void operator<(std::vector<double>& a, const std::vector<double>& b) {
// std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::less<T>());
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = a[i] < b[i];
}
}
}
bool smooth_operator(std::string &oper, bool &logical, bool &reverse, bool &falseNA) {
std::vector<std::string> f {"==", "!=", ">", "<", ">=", "<="};
logical = std::find(f.begin(), f.end(), oper) != f.end();
f = {"+", "-", "*", "^", "/", "%", "%%", "%/%"};
bool ok = logical || (std::find(f.begin(), f.end(), oper) != f.end());
if (ok) {
if (oper == "%%") oper = "%";
if (logical) {
if (reverse) {
if (oper == ">") {
oper = "<=";
} else if (oper == "<") {
oper = ">=";
} else if (oper == ">=") {
oper = "<";
} else if (oper == "<=") {
oper = ">";
}
reverse = false;
}
} else {
falseNA = false;
}
}
return ok;
}
//#include <execution>
SpatRaster SpatRaster::arith(SpatRaster x, std::string oper, bool falseNA, SpatOptions &opt) {
size_t nl = std::max(nlyr(), x.nlyr());
SpatRaster out = geometry(nl);
if (!(hasValues() && x.hasValues())) {
out.setError("raster has no values"); // or warn and treat as NA?
return out;
}
bool logical = false;
bool reverse = false;
if (!smooth_operator(oper, logical, reverse, falseNA)) {
out.setError("unknown arith function");
return out;
}
if (logical) {
out.setValueType(3);
} else if (oper != "/") {
std::vector<int> v = getValueType(false);
std::vector<int> vx = x.getValueType(false);
bool is_int = true;
for (size_t i = 0; i<v.size(); i++) {
if ((v[i] != 1) && (v[i] != 3)) {
is_int = false;
break;
}
}
for (size_t i = 0; i<vx.size(); i++) {
if (!is_int) break;
if ((vx[i] != 1) && (vx[i] != 3)) {
is_int = false;
}
}
if (is_int) {
out.setValueType(1);
}
}
if (!out.compare_geom(x, false, true, opt.get_tolerance(), true)) {
return(out);
}
if (!readStart()) {
out.setError(getError());
return(out);
}
if (!x.readStart()) {
out.setError(x.getError());
return(out);
}
if (!out.writeStart(opt, filenames())) {
readStop();
x.readStop();
return out;
}
// auto policy = std::execution::par;
for (size_t i = 0; i < out.bs.n; i++) {
std::vector<double> a, b;
readBlock(a, out.bs, i);
x.readBlock(b, out.bs, i);
recycle(a,b);
if (oper == "+") {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::plus<double>());
} else if (oper == "-") {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::minus<double>());
} else if (oper == "*") {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::multiplies<double>());
} else if (oper == "/") {
std::transform(a.begin(), a.end(), b.begin(), a.begin(), std::divides<double>());
} else if (oper == "^") {
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = std::pow(a[i], b[i]);
}
}
} else if (oper == "%") {
a % b;
} else if (oper == "%/%") {
for (size_t i=0; i<a.size(); i++) {
a[i] = floor(a[i] / b[i]);
}
} else if (oper == "==") {
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = a[i] == b[i];
}
}
} else if (oper == "!=") {
for (size_t i=0; i<a.size(); i++) {
if (std::isnan(a[i]) || std::isnan(b[i])) {
a[i] = NAN;
} else {
a[i] = a[i] != b[i];
}
}
} else if (oper == ">=") {
a >= b;
} else if (oper == "<=") {
a <= b;
} else if (oper == ">") {
a > b;
} else if (oper == "<") {
a < b;
}
if (falseNA) {
for (double& d : a) if (!d) d = NAN;
}
if (!out.writeBlock(a, i)) return out;
}
out.writeStop();
readStop();
x.readStop();
return(out);
}
SpatRaster SpatRaster::arith(double x, std::string oper, bool reverse, bool falseNA, SpatOptions &opt) {
SpatRaster out = geometry();
if (!hasValues()) {
out.setError("raster has no values"); // or warn and treat as NA?
return out;
}
bool logical;
if (!smooth_operator(oper, logical, reverse, falseNA)) {
out.setError("unknown arith function");
return out;
}
if (logical) {
out.setValueType(3);
} else if (oper != "/") {
std::vector<int> v = getValueType(false);
bool is_int = true;
for (size_t i = 0; i<v.size(); i++) {
if ((v[i] != 1) && (v[i] != 3)) {
is_int = false;
break;
}
}
if (is_int && (x == std::round(x))) {
out.setValueType(1);
}
}
if (!readStart()) {
out.setError(getError());
return(out);
}
if (!out.writeStart(opt, filenames())) {
readStop();
return out;
}
for (size_t i = 0; i < out.bs.n; i++) {
std::vector<double> a;
readBlock(a, out.bs, i);
if (std::isnan(x)) {
std::fill(a.begin(), a.end(), NAN);
//for (double& d : a) d = NAN;
} else if (oper == "+") {
// std::for_each(std::execution::par, a.begin(), a.end(), [&](double& d) { d += x; });
for (double& d : a) d += x;
} else if (oper == "-") {
if (reverse) {
for (double& d : a) d = x - d;
} else {
for (double& d : a) d -= x;
}
}
else if (oper == "*") {
for(double& d : a) d *= x;
} else if (oper == "/") {
if (reverse) {
for (double& d : a) d = x / d;
} else {
for (double& d : a) d /= x;
}
} else if (oper == "^") {
if (reverse) {
for (double& d : a) d = std::pow(x, d);
} else {
for (double& d : a) d = std::pow(d, x);
}
} else if (oper == "%") {
if (reverse) {
for (size_t i=0; i<a.size(); i++) {
a[i] = R_modulo(x, a[i]);
}
} else {
for (size_t i=0; i<a.size(); i++) {
a[i] = R_modulo(a[i], x);
}
}
} else if (oper == "%/%") {
if (reverse) {
for (double& d : a) d = floor(x / d);
} else {
for (double& d : a) d = floor(d / x);
}
} else if (oper == "==") {
for (double& d : a) if (!std::isnan(d)) d = d == x;
} else if (oper == "!=") {
for(double& d : a) if (!std::isnan(d)) d = d != x;
} else if (oper == ">=") {
for (double& d : a) if (!std::isnan(d)) d = d >= x;
} else if (oper == "<=") {
for (double& d : a) if (!std::isnan(d)) d = d <= x;
} else if (oper == ">") {
for (double& d : a) if (!std::isnan(d)) d = d > x;
} else if (oper == "<") {
for (double& d : a) if (!std::isnan(d)) d = d < x;
} else {
out.setError("unknown arith function");
return out;
}
if (falseNA) {
for (double& d : a) if (!d) d = NAN;
}
if (!out.writeBlock(a, i)) return out;
}
out.writeStop();
readStop();
return(out);
}
SpatRaster SpatRaster::is_true(bool falseNA, SpatOptions &opt) {
return arith(1, "==", false, false, opt);
}
SpatRaster SpatRaster::is_false(bool falseNA, SpatOptions &opt) {
return arith(1, "!=", false, falseNA, opt);
}
SpatRaster SpatRaster::arith(std::vector<double> x, std::string oper, bool reverse, bool falseNA, SpatOptions &opt) {
if (x.empty()) {
SpatRaster out;
out.setError("cannot compute with nothing");
return out;
}
if (!hasValues()) {
SpatRaster out;
out.setError("raster has no values"); // or warn and treat as NA?
return out;
}
if (x.size() == 1) {
return(arith(x[0], oper, reverse, falseNA, opt));
}
size_t innl = nlyr();
size_t outnl = innl;
if (x.size() > innl) {
outnl = x.size();
}
SpatRaster out = geometry(outnl);
bool logical=false;
if (!smooth_operator(oper, logical, reverse, falseNA)) {
out.setError("unknown arith function");
return out;
}
if (logical) {
out.setValueType(3);
} else if (oper != "/") {
std::vector<int> v = getValueType(false);
bool is_int = true;
for (size_t i = 0; i<v.size(); i++) {
if ((v[i] != 1) && (v[i] != 3)) {
is_int = false;
break;
}
}
for (size_t i = 0; i<x.size(); i++) {
if (!is_int) break;
is_int = x[i] == std::round(x[i]);
}
if (is_int) {
out.setValueType(1);
}
}
if (!readStart()) {
out.setError(getError());
return(out);
}
if (!out.writeStart(opt, filenames())) {
readStop();
return out;
}
size_t nc = ncol();
recycle(x, outnl);
for (size_t i = 0; i < out.bs.n; i++) {
std::vector<double> v;
readBlock(v, out.bs, i);
if (outnl > innl) {
recycle(v, outnl * out.bs.nrows[i] * nc);
}
//std::vector<double> vv;
size_t off = out.bs.nrows[i] * nc;
for (size_t j=0; j<outnl; j++) {
size_t s = j * off;
if (std::isnan(x[j])) {
for (size_t k=0; k<off; k++) {
v[s+k] = NAN;
}
} else if (oper == "+") {
for (size_t k=0; k<off; k++) {
v[s+k] += x[j];
}
} else if (oper == "-") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = x[j] - v[s+k];
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] -= x[j];
}
}
} else if (oper == "*") {
for (size_t k=0; k<off; k++) {
v[s+k] *= x[j];
}
} else if (oper == "/") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = x[j] / v[s+k];
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] /= x[j];
}
}
} else if (oper == "^") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = std::pow(x[j], v[s+k]);
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] = std::pow(v[s+k], x[j]);
}
}
} else if (oper == "%") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = R_modulo(x[j], v[s+k]);
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] = R_modulo(v[s+k], x[j]);
}
}
} else if (oper == "==") {
for (size_t k=0; k<off; k++) {
v[s+k] = v[s+k] == x[j];
}
} else if (oper == "!=") {
for (size_t k=0; k<off; k++) {
v[s+k] = v[s+k] != x[j];
}
} else if (oper == ">=") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] >= x[j];
}
} else if (oper == "<=") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] <= x[j];
}
} else if (oper == ">") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] > x[j];
}
} else if (oper == "<") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] < x[j];
}
} else {
out.setError("unknown arith function");
return out;
}
}
if (falseNA) {
for (double& d : v) if (!d) d = NAN;
}
if (!out.writeBlock(v, i)) return out;
}
out.writeStop();
readStop();
return(out);
}
SpatRaster SpatRaster::arith_m(std::vector<double> x, std::string oper, std::vector<size_t> dim, bool reverse, SpatOptions &opt) {
SpatRaster out = geometry();
if (!hasValues()) {
out.setError("raster has no values"); // or warn and treat as NA?
return out;
}
size_t nx = x.size();
if (nx == 0) {
out.setError("cannot compute with nothing");
return out;
}
if (dim.size() != 2) {
out.setError("incorrect dimensions");
return out;
}
if ((dim[1] * dim[0]) != nx) {
out.setError("incorrect matrix dimensions (dim(m) != length(x))");
return out;
}
if (nx == 1) {
return(arith(x[0], oper, reverse, false, opt));
}
// single cell
if (dim[0] < 2) {
return(arith(x, oper, reverse, false, opt));
}
if ((double) dim[0] > ncell()) {
out.setError("incorrect matrix dimensions (nrow > ncell(x))");
return out;
}
size_t nl = nlyr();
if (dim[1] > nl) {
out.setError("incorrect matrix dimensions (ncol != nlyr(x))");
return out;
} else if (dim[1] < nl) {
recycle(x, nl * dim[0]);
dim[1] = nl;
}
bool logical;
bool falseNA=false;
if (!smooth_operator(oper, logical, reverse, falseNA)) {
out.setError("unknown arith function");
return out;
}
if (logical) {
out.setValueType(3);
}
if (logical) {
out.setValueType(3);
} else if (oper != "/") {
std::vector<int> v = getValueType(false);
bool is_int = true;
for (size_t i = 0; i<v.size(); i++) {
if ((v[i] != 1) && (v[i] != 3)) {
is_int = false;
break;
}
}
for (size_t i = 0; i<x.size(); i++) {
if (!is_int) break;
is_int = x[i] == std::round(x[i]);
}
if (is_int) {
out.setValueType(1);
}
}
if (!readStart()) {
out.setError(getError());
return(out);
}
if (!out.writeStart(opt, filenames())) {
readStop();
return out;
}
size_t nc = ncol();
for (size_t i = 0; i < out.bs.n; i++) {
std::vector<double> v;
readBlock(v, out.bs, i);
size_t off = out.bs.nrows[i] * nc;
for (size_t j=0; j<nl; j++) {
size_t s = j * off;
size_t d = j * dim[0];
std::vector<double> xj = {x.begin()+d, x.begin()+d+dim[0]};
size_t start = (out.bs.row[i] * nc) % xj.size();
if (start != 0) {
std::rotate(xj.begin(), xj.begin()+start, xj.end());
}
recycle(xj, off);
if (oper == "+") {
for (size_t k=0; k<off; k++) {
v[s+k] += xj[k];
}
} else if (oper == "-") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = xj[k] - v[s+k];
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] -= xj[k];
}
}
} else if (oper == "*") {
for (size_t k=0; k<off; k++) {
v[s+k] *= xj[k];
}
} else if (oper == "/") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = xj[k] / v[s+k];
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] /= xj[k];
}
}
} else if (oper == "^") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = std::pow(xj[k], v[s+k]);
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] = std::pow(v[s+k], xj[k]);
}
}
} else if (oper == "%") {
if (reverse) {
for (size_t k=0; k<off; k++) {
v[s+k] = R_modulo(xj[k], v[s+k]);
}
} else {
for (size_t k=0; k<off; k++) {
v[s+k] = R_modulo(v[s+k], xj[k]);
}
}
} else if (oper == "==") {
for (size_t k=0; k<off; k++) {
v[s+k] = v[s+k] == xj[k];
}
} else if (oper == "!=") {
for (size_t k=0; k<off; k++) {
v[s+k] = v[s+k] != xj[k];
}
} else if (oper == ">=") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] >= xj[k];
}
} else if (oper == "<=") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] <= xj[k];
}
} else if (oper == ">") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] > xj[k];
}
} else if (oper == "<") {
for (size_t k=0; k<off; k++) {
if (!std::isnan(v[s+k])) v[s+k] = v[s+k] < xj[k];
}
} else {
// stop
}
}
if (!out.writeBlock(v, i)) return out;
}
out.writeStop();
readStop();
return(out);
}
template <typename T> int sign(T value) {
return (T(0) < value) - (value < T(0));
}
double dabs(double x) {
return (x < 0 ? -1 * x : x);
}
SpatRaster SpatRaster::math(std::string fun, SpatOptions &opt) {
SpatRaster out = geometry();
if (!hasValues()) return out;
std::vector<std::string> f = {"ceiling", "floor", "trunc", "sign", "log", "log10", "log2", "log1p", "exp", "expm1", "abs", "sqrt"};
if (std::find(f.begin(), f.end(), fun) == f.end()) {
out.setError("unknown math function");
return out;
}
f = {"ceiling", "floor", "trunc", "sign"};
if (std::find(f.begin(), f.end(), fun) != f.end()) {
out.setValueType(1);
}
std::function<double(double)> mathFun;
if (fun == "sqrt") {
mathFun = static_cast<double(*)(double)>(sqrt);
} else if (fun == "abs") {
mathFun = dabs;
} else if (fun == "log") {
mathFun = static_cast<double(*)(double)>(log);
} else if (fun == "log2") {
mathFun = static_cast<double(*)(double)>(log2);
} else if (fun == "log10") {
mathFun = static_cast<double(*)(double)>(log10);
} else if (fun == "log1p") {
mathFun = static_cast<double(*)(double)>(log1p);
} else if (fun == "exp") {
mathFun = static_cast<double(*)(double)>(exp);
} else if (fun == "expm1") {
mathFun = static_cast<double(*)(double)>(expm1);
} else if (fun == "sign") {
mathFun = sign<double>;
} else if (fun == "ceiling") {
mathFun = static_cast<double(*)(double)>(ceil);
} else if (fun == "floor") {
mathFun = static_cast<double(*)(double)>(floor);
} else if (fun == "trunc") {
mathFun = static_cast<double(*)(double)>(trunc);
}
if (!readStart()) {
out.setError(getError());
return(out);
}
if (!out.writeStart(opt, filenames())) {
readStop();
return out;
}
for (size_t i = 0; i < out.bs.n; i++) {
std::vector<double> a;
readBlock(a, out.bs, i);
#if defined(HAVE_TBB) && !defined(__APPLE__)
if (opt.parallel) {
tbb::parallel_for(tbb::blocked_range<size_t>(0, a.size()),
[&](const tbb::blocked_range<size_t>& range) {
for (size_t i = range.begin(); i != range.end(); i++) {
if (!std::isnan(a[i])) a[i] = mathFun(a[i]);
}
});
} else {
for (double& d : a) if (!std::isnan(d)) d = mathFun(d);
}
#else
for (double& d : a) if (!std::isnan(d)) d = mathFun(d);
#endif
if (!out.writeBlock(a, i)) return out;
}
out.writeStop();
readStop();
return(out);
}
SpatRaster SpatRaster::math2(std::string fun, unsigned digits, SpatOptions &opt) {
SpatRaster out = geometry();
if (!hasValues()) return out;
std::vector<std::string> f {"round", "signif"};
if (std::find(f.begin(), f.end(), fun) == f.end()) {
out.setError("unknown math2 function");
return out;
}
if (digits == 0) out.setValueType(1);
if (!readStart()) {
out.setError(getError());
return(out);
}
if (!out.writeStart(opt, filenames())) {
readStop();
return out;
}
for (size_t i = 0; i < out.bs.n; i++) {
std::vector<double> a;
readBlock(a, out.bs, i);
if (fun == "round") {
for(double& d : a) d = roundn(d, digits);
} else if (fun == "signif") {
for(double& d : a) if (!std::isnan(d)) d = signif(d, digits);
}
if (!out.writeBlock(a, i)) return out;
}
out.writeStop();
readStop();
return(out);
}
double sin_pi(double &x) {
return sin(x * M_PI);
}
double cos_pi(double &x) {
return sin(x * M_PI);
}
double tan_pi(double &x) {
return sin(x * M_PI);
}
SpatRaster SpatRaster::trig(std::string fun, SpatOptions &opt) {
SpatRaster out = geometry();
if (!hasValues()) return out;
std::vector<std::string> f {"acos", "asin", "atan", "cos", "sin", "tan", "acosh", "asinh", "atanh", "cosh", "cospi", "sinh", "sinpi", "tanh", "tanpi"};
if (std::find(f.begin(), f.end(), fun) == f.end()) {
out.setError("unknown trig function");
return out;
}
std::function<double(double&)> trigFun;
if (fun == "sin") {
trigFun = static_cast<double(*)(double)>(sin);
} else if (fun == "cos") {
trigFun = static_cast<double(*)(double)>(cos);
} else if (fun == "tan") {
trigFun = static_cast<double(*)(double)>(tan);
} else if (fun == "asin") {
trigFun = static_cast<double(*)(double)>(asin);
} else if (fun == "acos") {
trigFun = static_cast<double(*)(double)>(acos);
} else if (fun == "atan") {
trigFun = static_cast<double(*)(double)>(atan);
} else if (fun == "sinh") {
trigFun = static_cast<double(*)(double)>(sinh);
} else if (fun == "cosh") {
trigFun = static_cast<double(*)(double)>(cosh);
} else if (fun == "tanh") {
trigFun = static_cast<double(*)(double)>(tanh);
} else if (fun == "asinh") {
trigFun = static_cast<double(*)(double)>(asinh);
} else if (fun == "acosh") {
trigFun = static_cast<double(*)(double)>(acosh);
} else if (fun == "atanh") {
trigFun = static_cast<double(*)(double)>(atanh);
} else if (fun == "sinpi") {
trigFun = sin_pi;
} else if (fun == "cospi") {
trigFun = cos_pi;
} else if (fun == "tanpi") {
trigFun = tan_pi;
}
if (!readStart()) {
out.setError(getError());
return(out);
}
if (!out.writeStart(opt, filenames())) {
readStop();
return out;
}
for (size_t i = 0; i < out.bs.n; i++) {
std::vector<double> a;
readValues(a, out.bs.row[i], out.bs.nrows[i], 0, ncol());
#if defined(HAVE_TBB) && !defined(__APPLE__)
if (opt.parallel) {
tbb::parallel_for(tbb::blocked_range<size_t>(0, a.size()),
[&](const tbb::blocked_range<size_t>& range) {
for (size_t i = range.begin(); i != range.end(); i++) {
if (!std::isnan(a[i])) {
a[i] = trigFun(a[i]);
}
}
});
} else {
for (double& d : a) if (!std::isnan(d)) d = trigFun(d);
}
#else
for (double& d : a) if (!std::isnan(d)) d = trigFun(d);
#endif
if (!out.writeBlock(a, i)) return out;
}
out.writeStop();
readStop();
return(out);
}
SpatRaster SpatRaster::atan_2(SpatRaster x, SpatOptions &opt) {
size_t nl = std::max(nlyr(), x.nlyr());
SpatRaster out = geometry(nl);
if ((!hasValues()) || (!x.hasValues())) {
return out;
}
if (!readStart()) {
out.setError(getError());