For loop, Brace indexing is not supported for variables of this type.

This is my for loop, I wasnt too sure how set up the for loop

All_Values = [ ElecsB; ElecsU; EarsB; EarsU; FaceB; FaceU; NeckB; NeckU];

for i = 1: length(All_Values)

a(i,:) = length(find(All_Values{i}(:,4)>25))/length(All_Values{i}(:,4));

end

I am getting this error message. Can you please point me how to fix this error?

Brace indexing is not supported for variables of this type.

Error in Allmodels (line 18)

a(i,:) = length(find(All_Values{i}(:,4)>25))/length(All_Values{i}(:,4));

Answer 1

[Star Strider]

The ‘All_Values’ matrix is not a cell array, so you cannot use cell array indexing for it. (I am not exactly certain what it contains.)

If it is defined as:

[ ElecsB, ElecsU, EarsB, EarsU, FaceB, FaceU, NeckB, NeckU] = deal(rand(1,10)*35);      % Create Unsupplied Variables

All_Values = { ElecsB; ElecsU; EarsB; EarsU; FaceB; FaceU; NeckB; NeckU };              % Define As Cell Array
for i = 1: length(All_Values)
    a(i,:) = length(find(All_Values{i}(:,4)>25))/length(All_Values{i}(:,4));
end

a = 8×1

0 0 0 0 0 0 0 0

With that change, it works.

.

[Alexander Guillen]

Sorry, I should had given more details - All_values contains different numerical matrices. For example, ElecsB is a numerical matrix which contains 4 columns - this applies for all

[Alexander Guillen]

It works, Thank you very much

[Image Analyst]

OK, great, but you still might want to review the link I gave below. There is lots of other good stuff in the FAQ too besides that.

[Star Strider]

Note that length is a bit ambiguous with respect to cell arrays.

[ ElecsB, ElecsU, EarsB, EarsU, FaceB, FaceU, NeckB, NeckU] = deal(mat2cell(rand(10,32)*35, ones(1,10), 4*ones(1,8)));      % Create Unsupplied Variables

All_Values = { ElecsB; ElecsU; EarsB; EarsU; FaceB; FaceU; NeckB; NeckU }              % Define As Cell Array

All_Values = 8×1 cell array
    {10×8 cell}
    {10×8 cell}
    {10×8 cell}
    {10×8 cell}
    {10×8 cell}
    {10×8 cell}
    {10×8 cell}
    {10×8 cell}

[rows,cols] = cellfun(@size, All_Values)

rows = 8×1

10 10 10 10 10 10 10 10

cols = 8×1

8 8 8 8 8 8 8 8

for i = 1: length(All_Values)
    La = cellfun(@gt,All_Values{i}(:,4), repelem({25},rows(1),1), 'Unif',0)          % Logical Array
    a(i,:) = length(find(All_Values{i}(:,4)>25))/length(All_Values{i}(:,4));
end

La = 10×1 cell array
    {[0 0 0 0]}
    {[0 0 1 0]}
    {[0 0 0 0]}
    {[1 0 0 0]}
    {[1 0 0 0]}
    {[0 0 0 0]}
    {[0 0 1 1]}
    {[0 1 0 0]}
    {[0 1 1 1]}
    {[0 1 1 0]}

Operator '>' is not supported for operands of type 'cell'.

I managed to get the comparison working and producing the ‘La’ logical array. I leave the rest to you, since I’m not certain what you want to do.

The error refers to the ‘a(:,i)’ assignment. That is solved in ‘La’ and since I do not understand what the ‘a(i,:)’ assignment does so I defer to you to implement it.

.

Answer 2

[Image Analyst]

All_Values is not a cell array. It is a normal double array (probably) so you should use parentheses.

See the FAQ for a description of cell arrays and when to use braces, parentheses, and brackets:

What is a cell array