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

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Hafeezullah Amin
Hafeezullah Amin 2019-6-20
评论： Aravind Ravikumar 2019-6-20
error.png
Hi, Can any one have idea, how to resolve it. This is freqently appearing when I run my code.

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回答（1 个）

Aravind Ravikumar
Aravind Ravikumar 2019-6-20
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.
  2 个评论
Hafeezullah Amin
Hafeezullah Amin 2019-6-20
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. error 2.png
********************************************************
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
Aravind Ravikumar 2019-6-20
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?

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