how to use string in eval function

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Ham Man
Ham Man on 29 Aug 2022
Commented: Image Analyst on 29 Aug 2022
I'd like to use eval for this expression: sheet ='p1_Q1_test';
It works for num2str(x) but does not work for string y.
How can I use the string 'y' correctly in eval?
x = 1;
y = 'Q1';
eval(['sheet =p' num2str(x) '_' y '_final']);
A = xlsread('E:\myfolder\datasheet.xlsx', sheet);
error:
Undefined function or variable 'p1_Q1_test'.

Answers (2)

KSSV
KSSV on 29 Aug 2022
x = 1;
y = 'Q1';
sheet =strcat('P',num2str(x),'_',y,'_final')
sheet = 'P1_Q1_final'

Stephen23
Stephen23 on 29 Aug 2022
Moved: Image Analyst on 29 Aug 2022
"I'd like to use eval for this expression: sheet ='p1_Q1_test';"
Why write such complex code?
x = 1;
y = 'Q1';
sheet = ['p',num2str(x),'_',y,'_final']
sheet = 'p1_Q1_final'
or even better using SPRINTF:
sheet = sprintf('p%d_%s_final',x,y)
sheet = 'p1_Q1_final'
  2 Comments
Image Analyst
Image Analyst on 29 Aug 2022
@Ham Man then please click the "Accept this answer" link to award @Stephen23 "reputation points". He'll appreciate it. Thanks in advance. 🙂

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