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Added logspace which mimics Matlab/octave's logspace. #48

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Added logspace which mimics Matlab/octave's logspace. #48

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8 changes: 8 additions & 0 deletions src/documentation.html
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,7 @@
<tr><td><tt>largeArray</tt><td>Don't prettyPrint Arrays larger than this
<tr><td><tt>leq</tt><td>Pointwise x&lt;=y
<tr><td><tt>linspace</tt><td>Generate evenly spaced values
<tr><td><tt>logspace</tt><td>Generate logarithmically spaced values
<tr><td><tt>log</tt><td>Pointwise Math.log(x)
<tr><td><tt>lshift</tt><td>Pointwise x&lt;&lt;y
<tr><td><tt>lshifteq</tt><td>Pointwise x&lt;&lt;=y
Expand Down Expand Up @@ -397,6 +398,13 @@ <h1>Utility functions</h1>
OUT> [1,1.5,2,2.5,3]
</pre>

Or a vector of logarithmically spaced values between Math.pow(10,a) and Math.pow(10,b):

<pre>
IN> numeric.logspace(0,1,5);
OUT> [1, 1.7782794100389228, 3.1622776601683795, 5.623413251903491, 10]
</pre>

<!--
<pre>
IN> numeric.blockMatrix([[[[1,2],[3,4]],[[5,6],[7,8]]],
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6 changes: 6 additions & 0 deletions src/numeric.js
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Expand Up @@ -928,6 +928,12 @@ numeric.linspace = function linspace(a,b,n) {
return ret;
}

numeric.logspace = function logspace(a,b,n) {
return numeric.linspace(a,b,n).map(
function(x) { return Math.pow(10,x); }
);
}

numeric.getBlock = function getBlock(x,from,to) {
var s = numeric.dim(x);
function foo(x,k) {
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