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adding some function help files for field calculator, thanks to Zolta…
…n Siki
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<h3>acos() function</h3> | ||
Returns arcuscosinus of a value in radians. | ||
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<p><h4>Syntax</h4> | ||
acos(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> cos of an angle.</p> | ||
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<p><h4>Example</h4> | ||
acos(0.5) -> 1.0471975511966</p> |
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<h3>asin() function</h3> | ||
Returns arcussinus of a value in radians. | ||
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<p><h4>Syntax</h4> | ||
asin(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> sin of an angle.</p> | ||
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<p><h4>Example</h4> | ||
asin(1.0) -> 1.5707963267949</p> |
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<h3>atan() function</h3> | ||
Returns arcustanget of a value in radians. | ||
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<p><h4>Syntax</h4> | ||
atan(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> tan of an angle.</p> | ||
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<p><h4>Example</h4> | ||
atan(0.5) -> 0.463647609000806</p> |
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<h3>atan2() function</h3> | ||
Returns arcustangens of y/x using the signs of the two | ||
arguments to determine the quadrant of the result | ||
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<p><h4>Syntax</h4> | ||
atan2(<i>real</i>, <i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> y coordinate difference<br> | ||
<i>real</i> -> x coordinate difference</p> | ||
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<p><h4>Example</h4> | ||
atan2(1.0, 1.732) -> 0.523611477769969</p> |
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<h3>cos() function</h3> | ||
Returns cosinus of an angle. | ||
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<p><h4>Syntax</h4> | ||
cos(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> angle in radians.</p> | ||
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<p><h4>Example</h4> | ||
cos(1.571) -> 0.000796326710733263</p> |
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<h3>exp() function</h3> | ||
Returns exponential of an value. | ||
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<p><h4>Syntax</h4> | ||
exp(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> number.</p> | ||
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<p><h4>Example</h4> | ||
exp(1.0) -> 2.71828182845905</p> |
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<h3>sin() function</h3> | ||
Returns sinus of an angle. | ||
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<p><h4>Syntax</h4> | ||
sin(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> angle in radians.</p> | ||
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<p><h4>Example</h4> | ||
sin(1.571) -> 0.999999682931835</p> |
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<h3>sqrt() function</h3> | ||
Returns square root of a value | ||
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<p><h4>Syntax</h4> | ||
sqrt(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> number.</p> | ||
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<p><h4>Example</h4> | ||
sqrt(9) -> 3</p> |
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<h3>tan() function</h3> | ||
Returns tangent of an angle. | ||
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<p><h4>Syntax</h4> | ||
tan(<i>real</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<i>real</i> -> angle in radians.</p> | ||
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<p><h4>Example</h4> | ||
tan(1.0) -> 1.5574077246549</p> |
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<h3>toint function</h3> | ||
Converts a string to integer number. Nothing changed if a value cannot be converted to integer (e.g '123asd' is invalid). | ||
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<p><h4>Syntax</h4> | ||
toint(<i>string</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<!-- List args for functions here--> | ||
<i> string</i> -> is string. The String to convert to integer number.</p> | ||
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<p><h4>Example</h4> | ||
<!-- Show example of function.--> | ||
toint('123') -> 123</p> |
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<h3>toreal function</h3> | ||
Converts a string to real number. Nothing changed if a value cannot be converted to real (e.g '123.56asd' is invalid). Numbers are rounded after saving changes if the precision is smaller than the result of the conversion. | ||
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<p><h4>Syntax</h4> | ||
toreal(<i>string</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<!-- List args for functions here--> | ||
<i> string</i> -> is string. The String to convert to real number.</p> | ||
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<p><h4>Example</h4> | ||
<!-- Show example of function.--> | ||
toreal('123.45') -> 123.45</p> |
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<h3>tostring function</h3> | ||
Converts a number to string. | ||
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<p><h4>Syntax</h4> | ||
tostring(<i>number</i>)</p> | ||
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<p><h4>Arguments</h4> | ||
<!-- List args for functions here--> | ||
<i>number</i> -> is integer or real. The number to convert to string.</p> | ||
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<p><h4>Example</h4> | ||
<!-- Show example of function.--> | ||
tostring(123) -> '123'</p> |