MATLAB: Creating array from 1.e-20 to 1, with steps 1.e-19, 1.e-18..

:arrayee-20linspacelogspacematrixscientific notationsteps;

The only command I know to control the steps is when you use the : operator, however the step is too small (0.e+01) and it gives me an error of a 1 by 0 matrix.

Not sure what to use here, I have tried linspace and logspace but none seem to be of help.

Thanks!

Best Answer

logspace(-20,0,21)

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MATLAB: Matlab wont generate vector, [1E-15:10:1E-12]

How many elements does the vector have that you desire to see? That 10 in there is not the number of steps to be taken, but the additive increment.

The first element will be 1e-15.

Ok, then the increment is 10, so we will have 1e-15 + 10. Oh. But that exceeds 1e-12. Darn. So MATLAB gives up at 1e-15. What is the problem, except for not knowing how the colon operator is defined to work? I'll guess that you really wanted to use either linspace or logspace?

Don't forget to use the right display format for that result too. With some display formats, 1e-15 may be displayed as zero.

help format

MATLAB: Interpolating data in a better way

Yeah, try interp2 -- sotoo

[nr,nc]=size(rawdata);
[X,Y] = meshgrid(1:nr,1:nc);   % the original array mesh
[Xq,Yq] = meshgrid(linspace(1,nr,20),linspace(1,nr,20));  % the 20X copy
Vq = interp2(X,Y,rawdat,Xq,Yq);

Best Answer

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MATLAB: Matlab wont generate vector, [1E-15:10:1E-12]

MATLAB: Interpolating data in a better way

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