Calculators and excel have different answer to matlab for inverse of a matrix

I have a code which calculates a 10x10 matrix for every value of k. When I perform an inverse of the matrix, I can get an answer. However when I use Excel, TI-NSPIRE calculators and online calculators they give me a different answer than what is produced in matlab.

Also as k increases eventually the matrix becomes singular according to matlab, however Excel, TI-NSPIRE calculators and online calculators can manage to calculate the answer.

Can anyone explain why matlab is different to everything else?

I have tried using

pinv()

but the answer is still not correct

[Image Analyst]

Read this link and then attach your sample matrix that gives different results. Describe what k is - I have no idea because you didn't tell us. Why should arbitrary random matrices, that I might think up as samples to take the inverse of, depend on some value of k???

[the cyclist]

Fully acknowledging that I may be biased ...

Out of all the sources of matrix calculation you have mentioned, I would trust MATLAB the most.

I agree with Image Analyst, attaching an example where you see differences is key to us all understanding this.

[Walter Roberson]

When I try a 5 x 5 in MATLAB I get the same result as in Maple, to within round-off error.

What is rcond() of your matrices?