Writetable yields error "operator not supported".

Trying to save a table into .csv with writetable. I keep getting the error message below. Similar outcome with write, or writexls. Any cues? Matlab 2021b

>> writetable(all_data,'myData.csv','Delimiter',',')
Operator '==' is not supported for operands of type 'cell'.

[Walter Roberson]

What is class(all_data) ? I suspect it is cell, but would need to be table.

[Walter Roberson]

Also, is it possible that the table has non-scalar cells stored inside it? Like all_data.SomeVar(5) might be a cell array? I am excluding here the where the variable is character vectors, which would be stored internally as the entire variable being a cell array of character vectors.

[Mateo Leganes]

class(all_data) is 'table'. 

All variables are numeric, although if they had strings in it should still work isn't it?:

numericVars = varfun(@isnumeric,all_data,'output','uniform') numericVars =

1×19 logical array

1   1   1   1   1   1   1   1   1   1   1   1   1   1   1   1   1   1   1

Maybe it's due to the variable names having some illegal character?

all_data.Properties.VariableNames

ans =

1×19 cell array

Columns 1 through 5

{'subject'}    {'acc_con'}    {'acc_incon'}    {'acc_CS-'}    {'acc_CS-_con'}

Columns 6 through 10

{'acc_CS-_incon'}    {'acc_CS+'}    {'acc_CS+_con'}    {'acc_CS+_incon'}    {'acc_grey'}

Columns 11 through 14

{'acc_grey_con'}    {'acc_grey_incon'}    {'RT_CS-_con'}    {'RT_CS-_incon'}

Columns 15 through 19

{'RT_CS+_con'}    {'RT_CS+_incon'}    {'RT_grey_con'}    {'RT_grey_incon'}    {'odd_even'}

[Walter Roberson]

As an experiment, try

restoredefaultpath; rehash toolboxcache

and try again.

You just might have a third-party toolbox that is providing functions that are interfering. For example do you have SPM12 installed ?

[Mateo Leganes]

That fixed it! thanks!

As third-party I think I only have Psychtoolbox and ANSLAB installed.

[Walter Roberson]

I am not familiar with ANSLAB.

Psychtoolbox is usually pretty good about not interfering with MATLAB.

You could add one of those at a time back to your MATLAB path, to see which of the two packages is causing the problem.