times function for argument of type cell?

I have an argument of type cell (2785 x 20) and I need to multyply every cell per 100 and divide it per 785. Thus I need a function like times for vectors

Answer 1

[Star Strider]

It is necessary to include the cell array as an argument to cellfun:

C = num2cell(randi(9,4, 5))

C = 4×5 cell array
    {[2]}    {[2]}    {[7]}    {[7]}    {[2]}
    {[9]}    {[8]}    {[1]}    {[5]}    {[4]}
    {[1]}    {[4]}    {[4]}    {[9]}    {[7]}
    {[3]}    {[5]}    {[8]}    {[7]}    {[4]}

percentages = cellfun(@(x)times(x,100/787), C)

percentages = 4×5

0.2541 0.2541 0.8895 0.8895 0.2541 1.1436 1.0165 0.1271 0.6353 0.5083 0.1271 0.5083 0.5083 1.1436 0.8895 0.3812 0.6353 1.0165 0.8895 0.5083

.

[Chiara Scarpellini]

If I use my data that are already cell arrays it says

Undefined function 'times' for input arguments of type 'cell'.

[Walter Roberson]

percentages = cellfun(@(x)x*(100/787), matrix_substances, 'uniform', 0)

[Chiara Scarpellini]

Operator '*' is not supported for operands of type 'cell'

[Walter Roberson]

What is the output of

 unique(cellfun(@class, matrix_substances, 'uniform', 0))

The message you are getting suggests that there is at least one location inside matrix_substances where the entry is a cell array instead of being a single number or [] .