Create a log-space vector

a_betancourt — Sat, 10 Jun 2023 20:43:47 GMT

All-

I am new to JSL and I want to know if there is an easy way to create a log-space vector--similarly to the function in MATLAB or Numpy.

Thanks.

-Alvaro

Re: Create a log-space vector

brady_brady — Thu, 18 Mar 2021 16:18:44 GMT

Hi,

This isn't built-in but fortunately isn't difficult, using the log10 function and matrices. Here are 2 examples with log output for each.

Cheers,

Brady

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//ex1: generate 9 logarithmically-spaced points between 10^3 and 10^7
lowExp = 3;
highExp = 7;
logVec1 = 10 ^ (lowExp :: highExp :: ((highExp - lowExp) / 10));
show (round(logVec1, 2));
print("\!n");

//ex2: generate 14 logarithmically-spaced points between 250 and 875
lowExp = log10(250);
highExp = log10(875);
logVec2 = 10 ^ (lowExp :: highExp :: ((highExp - lowExp) / 15));
show(round(logVec2, 2));

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Create a log-space vector

Re: Create a log-space vector