Readonly: Operands to the || and && operators must be convertable to logical scalar values. is eqal3, 153

Hi, Can any one have idea, how to resolve it. This is freqently appearing when I run my code.

Answer 1

[Aravind Ravikumar]

You get this when one or both operands are arrays. E.g.,

>> [1 2 3] && [4 5 6]
Operands to the || and && operators must be convertible to logical scalar values.

Check the two expressions or variables you are using for the || or && operation. You are using them as scalars but they are not.

You could refer to this link too.

[Hafeezullah Amin]

This is my code: I have loaded a file name S(1).mat, which contained many matices of different sizes. I want to extract matrix of size (129x10000 or above). I have loaded EEGLAB, from where I am using their function pop_importdata(). I have attached the print screen of my workspace which the loaded data.

********************************************************

clc;

for S =1:100

load(['C:\Users\....\S (' int2str(S) ').mat']);% data

z_c = whos;

sam = 0;

for k = 1:length(z_c)

if z_c(k,1).size(1,1) == 129 && z_c(k,1).size(1,2)>10000

name = z_c(k,1).name;

end

if z_c(k,1).size(1,1) == 129 && z_c(k,1).size(1,2)<10000 && z_c(k,1).size(1,2)>1

name1(k,:) = z_c(k,1).name;

sam = [sam + length(eval(name1(k,:)))];

end

end

epo = str2num(name(length(name)));

addpath (genpath('C:\Users\...\MATLAB\eeglabdevelopers')) % EEG lab folder

EEG = pop_importdata('data',name,'dataformat','matlab','srate',250);

eeg = [EEG.data(1:129,:)];

% new folder for cleaned file

name1 = (['C:\Users\...\EEG\S (' int2str(S) ').mat']);

save(name1,'eeg')

clear all;

end

*********************************************************************

[Aravind Ravikumar]

The only way I can imagine the error being genereted is cause of z_c(k,1).size(1,x) not being a scalar. Could you maybe try logging that before the if statements? Also, could you try using z_c(k).size(x) instead?