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vw-validate.html
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vw-validate.html
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<html>
<head>
<title>VW Validator</title>
<style>
body {
font-family: "Helvetica Neue","Helvetica","Arial",sans-serif;
background-color: #e6e987;
}
p {
margin: 0; padding: 0;
}
#vwForm {
width: 65%;
padding: 1em;
border-style: solid;
border-width: 1px;
border-color: white;
}
.vwFeedbackMsg {
}
.vwFeedbackMsgExample {
font-style: normal;
font-weight: bold;
font-family: monospace;
}
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.0.min.js"></script>
<script type="text/javascript">
var FIRST_FEEDBACK = true;
function resetFeedback() {
$("#vwFeedback").html("");
FIRST_FEEDBACK = true;
}
function addFeedback(msgHtml, margin) {
var currentHtml = $("#vwFeedback").html();
if (FIRST_FEEDBACK) {
currentHtml = "<h4>Validation Feedback</h4>";
FIRST_FEEDBACK = false;
}
var newHtml = currentHtml + "<p class=\"vwFeedbackMsg\" style=\"margin-left: " + margin + ";\">";
if (msgHtml.match(/!$/)) {
newHtml += "<b>" + msgHtml + "</b>";
}
else {
newHtml += msgHtml;
}
newHtml += "</p>";
$("#vwFeedback").html(newHtml);
}
function addExampleFeedback(exIndex, msg) {
addFeedback("<small>(example #" + (exIndex + 1) + ")</small> " + msg, 0);
}
function addExampleNamespaceFeedback(exIndex, namespaceIndex, msg) {
addFeedback("<small>(example #" + (exIndex + 1) + ", namespace #" + (namespaceIndex + 1) + ")</small> " + msg, "2.5em");
}
function addExampleNamespaceFeatureFeedback(exIndex, namespaceIndex, featIndex, msg) {
addFeedback("<small>(example #" + (exIndex + 1) + ", namespace #" + (namespaceIndex + 1) + ", feature #" + (featIndex + 1) + ")</small> " + msg, "5em");
}
function summarizeString(s) {
if (s.length < 120) {
return s;
}
return s.substring(0, 16) + "… " + s.substring(s.length - 16);
}
function isInteger(s) {
return s.match(/^(\+|-)?\d+$/);
}
function isFloat(s) {
return s.match(/^[+-]?\d+(\.\d+)?$/);
}
function validateVowpalWabbit() {
resetFeedback();
var vwData = $("#vwData").val();
if (vwData.match(/\r\n/)) {
addFeedback("Microsoft Windows -style newlines detected, please replace with Unix style (\\r\\n to just \\n)!");
}
if (vwData.match(/\r/)) {
addFeedback("Carriage returns detected, please replace with Unix style newlines (\\r to just \\n)!");
}
var vwExamples = vwData.split(/\n/);
addFeedback("Total of " + vwExamples.length + " examples pasted.");
addFeedback(" ");
for (var i=0; i < vwExamples.length; i++) {
var vwExample = vwExamples[i];
if ($.trim(vwExample) == "") {
addExampleFeedback(i, "Empty example, probably a dangling newline!");
continue;
}
addExampleFeedback(i, "Example “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExample) + "</span>”.");
var vwExPipeIdx = vwExample.indexOf("|");
if (vwExPipeIdx == null) {
addExampleFeedback(i, "Missing pipe ('|') separator in example.");
continue;
}
var vwExPrefix = vwExample.substr(0, vwExPipeIdx);
var vwExNamespaces = vwExample.substr(vwExPipeIdx + 1);
var vwExLabel = null;
var vwExImp = null;
var vwExBase = null;
var vwExTag = null;
var isLegacyExTag = false;
var vwExPrefixMatch = /^([^' ]+) ([^' ]+) ([^' ]+) '([^' ]+) $/.exec(vwExPrefix);
if (vwExPrefixMatch != null) {
addExampleFeedback(i, "Found “<label> <importance> [base] ['tag] |…” prefix format.");
vwExLabel = vwExPrefixMatch[1];
vwExImp = vwExPrefixMatch[2];
vwExBase = vwExPrefixMatch[3];
vwExTag = vwExPrefixMatch[4];
}
else {
var vwExPrefixMatch = /^([^' ]+) ([^' ]+) ([^' ]+) ([^' ]+)$/.exec(vwExPrefix);
if (vwExPrefixMatch != null) {
addExampleFeedback(i, "Found “<label> <importance> [base] [tag]|…” prefix format.");
vwExLabel = vwExPrefixMatch[1];
vwExImp = vwExPrefixMatch[2];
vwExBase = vwExPrefixMatch[3];
vwExTag = vwExPrefixMatch[4];
isLegacyExTag = true;
}
else {
var vwExPrefixMatch = /^([^' ]+) ([^' ]+) '([^' ]+) $/.exec(vwExPrefix);
if (vwExPrefixMatch != null) {
addExampleFeedback(i, "Found “<label> [importance] ['tag] |…” prefix format.");
vwExLabel = vwExPrefixMatch[1];
vwExImp = vwExPrefixMatch[2];
vwExTag = vwExPrefixMatch[3];
}
else {
var vwExPrefixMatch = /^([^' ]+) ([^' ]+) ([^' ]+)$/.exec(vwExPrefix);
if (vwExPrefixMatch != null) {
addExampleFeedback(i, "Found “<label> [importance] [tag]|…” prefix format.");
vwExLabel = vwExPrefixMatch[1];
vwExImp = vwExPrefixMatch[2];
vwExTag = vwExPrefixMatch[3];
isLegacyExTag = true;
}
else {
var vwExPrefixMatch = /^([^' ]+) '([^' ]+) $/.exec(vwExPrefix);
if (vwExPrefixMatch != null) {
addExampleFeedback(i, "Found “[label] ['tag] |…” prefix format.");
vwExLabel = vwExPrefixMatch[1];
vwExTag = vwExPrefixMatch[2];
}
else {
var vwExPrefixMatch = /^([^' ]+) ([^' ]+)$/.exec(vwExPrefix);
if (vwExPrefixMatch != null) {
addExampleFeedback(i, "Found “[label] [tag]|…” prefix format.");
vwExLabel = vwExPrefixMatch[1];
vwExTag = vwExPrefixMatch[2];
}
else {
var vwExPrefixMatch = /^([^' ]+) $/.exec(vwExPrefix);
if (vwExPrefixMatch != null) {
addExampleFeedback(i, "Found “[label] |…” prefix format.");
vwExLabel = vwExPrefixMatch[1];
}
else {
var ambPrefixEls = vwExPrefix.trim().split(" ");
addExampleFeedback(i, "Found “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExPrefix) + "</span>” ambiguous prefix with " + ambPrefixEls.length + " elements.");
vwExLabel = ambPrefixEls[0];
if (ambPrefixEls.length > 1) {
vwExImp = ambPrefixEls[1];
}
if (ambPrefixEls.length > 2) {
vwExTag = ambPrefixEls[2];
if (vwExTag.match(/^'/)) {
vwExTag = vwExTag.substr(1);
}
}
}
}
}
}
}
}
}
addExampleFeedback(i, "Example label / response / class is “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExLabel) + "</span>”.");
if (vwExImp == null) {
addExampleFeedback(i, "Example has default “<span class=\"vwFeedbackMsgExample\">1.0</span>” importance weight.");
}
else {
if (isFloat(vwExImp)) {
addExampleFeedback(i, "Importance weight is “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExImp) + "</span>”.");
}
else {
addExampleFeedback(i, "Importance weight “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExImp) + "</span>” must be a float!");
}
}
if (vwExBase == null) {
addExampleFeedback(i, "Example has default “<span class=\"vwFeedbackMsgExample\">0</span>” base.");
}
else {
if (isFloat(vwExBase)) {
addExampleFeedback(i, "Base is “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExBase) + "</span>”.");
}
else {
addExampleFeedback(i, "Base “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExBase) + "</span>” must be a float!");
}
}
if (vwExTag != null) {
if (isLegacyExTag) {
addExampleFeedback(i, "Tag is “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExTag) + "</span>” in the legacy format, should be preceded by a single quote!");
}
else {
addExampleFeedback(i, "Tag is “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExTag) + "</span>”.");
}
}
var vwExNamespaceEls = vwExNamespaces.split(" |");
var isDefaultUsed = false;
for (var j=0; j < vwExNamespaceEls.length; j++) {
var vwExNamespace = vwExNamespaceEls[j];
var namespaceMatch = /^(\S*) (.*)/.exec(vwExNamespace);
if (namespaceMatch != null) {
var vwExNamespace = namespaceMatch[1];
var vwExNamespaceFeatures = namespaceMatch[2].split(" ");
if (vwExNamespace != "") {
var vwExNamespaceName = null;
var vwExNamespaceScale = null;
if (vwExNamespace.match(/:/)) {
vwExNamespaceName = vwExNamespace.split(":")[0];
vwExNamespaceScale = vwExNamespace.split(":")[1];
}
else {
vwExNamespaceName = vwExNamespace;
}
addExampleNamespaceFeedback(i, j, "Namespace found with name “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExNamespaceName) + "</span>”.");
if (vwExNamespaceScale == null) {
addExampleNamespaceFeedback(i, j, "Using default scale of “<span class=\"vwFeedbackMsgExample\">1.0</span>” for namespace.");
}
else {
addExampleNamespaceFeedback(i, j, "Scale of namespace is “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwExNamespaceScale) + "</span>”.");
}
}
else {
if (isDefaultUsed) {
addExampleNamespaceFeedback(i, j, "Default namespace used more than once!");
}
else {
addExampleNamespaceFeedback(i, j, "Using default namespace.");
isDefaultUsed = true;
}
}
addExampleNamespaceFeedback(i, j, "Found " + vwExNamespaceFeatures.length + " feature(s).");
for (var k=0; k < vwExNamespaceFeatures.length; k++) {
var vwFeature = vwExNamespaceFeatures[k].split(":");
addExampleNamespaceFeatureFeedback(i, j, k, "Label “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwFeature[0]) + "</span>”.");
if (isInteger(vwFeature[0])) {
addExampleNamespaceFeatureFeedback(i, j, k, "Label is an integer, and will be used instead of the feature label hashing.");
}
switch (vwFeature.length) {
case 1:
addExampleNamespaceFeatureFeedback(i, j, k, "Using default value of “<span class=\"vwFeedbackMsgExample\">1</span>” for feature.");
break;
case 2:
addExampleNamespaceFeatureFeedback(i, j, k, "Value “<span class=\"vwFeedbackMsgExample\">" + summarizeString(vwFeature[1]) + "</span>”.");
break;
default:
addExampleNamespaceFeatureFeedback(i, j, k, "Badly formatted feature, too many colon : sections!");
}
}
}
else {
addExampleNamespaceFeedback(i, j, "Badly formed namespace.");
}
}
addFeedback(" ");
}
}
</script>
</head>
<body>
<div id="vwForm">
<h3>Vowpal Wabbit Data Format Validation</h3>
<p><small>by <a href="http://blog.someben.com/">Ben Gimpert</a></small> </p>
<p style="width: 80%; margin-top: 1em;">Not sure if your training data is in the right format for Vowpal Wabbit? Not seeing the results you expect from Vowpal Wabbit, in general? Paste a few lines of your training data into this text box, and then hit the “Validate” button below. Note that the only unambiguous prefixes for training examples have exactly one or four elements.</p>
<textarea id="vwData" style="width: 80%; height: 12em; font-family: monospace; margin-top: 1.5em; margin-bottom: 1.5em;">1 1.0 |MetricFeatures:3.28 height:1.5 length:2.0 |Says black with white stripes |OtherFeatures NumberOfLegs:4.0 HasStripes
1 1.0 zebra|MetricFeatures:3.28 height:1.5 length:2.0 |Says black with white stripes |OtherFeatures NumberOfLegs:4.0 HasStripes
1 2 'tag| a:2 b:3
1 2 'tag | a:2 b:3
1 2 tag | a:2 b:3
0 | price:.23 sqft:.25 age:.05 2006
1 2 'second_house | price:.18 sqft:.15 age:.35 1976
0 1 0.5 'third_house | price:.53 sqft:.32 age:.87 1924</textarea><br>
<button onclick="validateVowpalWabbit();">Validate</button>
</div>
<div id="vwFeedback" style="width: 80%; margin-left: 0.75em;">
</div>
</body>
</html>