Greater than operator not working in if statement

Here is my code, POLY60estra is a 1000x1 vector. here is the lines of code

for p=1:500
    if (POLY60estra(p,1) > 0) && (POLY60estra(p,1) <= 7.1)
        POLY60estra2(p,1) = POLYestra(p,1);
        POLY60estre2(p,1) = POLYestre(p,1);
    end
end

Thank you for any help ahead of time.

[Jacob Huhtala]

This is also for scrubbing bad data out of the vector, just for extra background

[the cyclist]

I assure you that the greater than operation is working. It's just not doing what you expect.

Please do two things to help us help you:

• Upload the variable POLY60estra in a MAT file, using the paperclip icon from the INSERT tools
• Be more specific when you say, "not working". Does the code crash? Does it give an answer you do not expect? Is the code going into the if statement when you don't expect it to?

Be specific about what you see as the problem, so that we can be specific in helping you solve it.

[Jacob Huhtala]

The code crashes when its ran, giving me the error code,

"Undefined operator '>' for input arguments of type 'table'.

Error in StressStrainLab (line 88)

if (POLY60estra(p,1) > 0) && (POLY60estra(p,1) <= 7.1)"

Answer 1

[David Hill]

No need for loop.

idx=(POLY60estra(1:500)>0&POLY60estra(1:500)<=7.1);
POLY60estra2(idx)=POLYestra(idx);
POLY60estre2(idx)=POLYestre(idx);

[Jacob Huhtala]

I get an error code if i try to do it like that

"Subscripting a table using linear indexing (one subscript) or multidimensional indexing (three or more subscripts) is not supported. Use a row subscript and a variable subscript."

[David Hill]

What is POLYestre? Below works for your file POLY60estra

a=POLY60estra.strain60ep;
idx=(a(1:500)>0&a(1:500)<=7.1);
POLY60estra2(idx)=a(idx);

[Jacob Huhtala]

That actually got it to work properly. Thank you