Storing the results from a loop using tool box functions in a new matrix

Hi there,

I'm calling a bunch of functions from the color toolbox for spectral data (p=31x3) to be converted to CIELAB values which I would like to store in a new matrix. This is my code:

for col = p

[xyz] = r2xyz(col,400,700,'d65_64');

[XYZ] = sum(xyz);

[lab] = xyz2lab(XYZ,'d65_64')

end

What I'm getting in the workspace is correct:

lab =

100.1127 -0.0331 0.0521

lab =

83.4176 0.7851 26.2322

lab =

86.5516 0.4043 22.8907

But I'd need to store these values in a new 3xn matrix called LAB

Most of the solutions offered in the community don't work because I'm using these functions.

Any advice is appreciated.

Thanks

SH

[the cyclist]

This question was already asked (and answered) here. Why ask again?

[Sascha Hein]

Thanks for your help but

lab(col,:) = xyz2lab(XYZ,'d65_64 ')

won't work.

Index in position 1 is invalid. Array indices must be positive integers or logical values.

Error in spectral_conversion (line 13)

lab(col,:) = xyz2lab(XYZ,'d65_64 ')

[the cyclist]

It's confusing to go back and forth between questions. Pasting my code here for convenience.

I think instead of

[lab] = xyz2lab(XYZ,'d65_64')

using

lab(col,:) = xyz2lab(XYZ,'d65_64')

should do what you want.

[the cyclist]

Are the functions r2xyz and xyz2lab from this File Exchange submission?

Can you upload an example of the variable p that works and gives lab output you mention?

[Sascha Hein]

Thanks for your help! This issue has been solved now in a different way. Thanks.