Error using sub2ind(line43)

I have this code

idx = sub2ind(size(map),ygrid,xgrid)

It causes Error using sub2ind(line43) Out of range subscript.

But I check the subscripts: where size(map) gives

ans = 5 5

and

all(find(ygrid<=5 & ygrid>=1))

gives

ans = logical
  1

and also

all(find(xgrid<=5 | xgrid>=1))

gives

ans = logical
  1

It seems all of the subscripts I specified in ygrid and xgrid. So I don't know why the error happens.

Answer 1

[Walter Roberson]

You tested

all(find(xgrid<=5 | xgrid>=1))

Your test should have been &

[Hao-Ming Peng]

Oh! Thank you! I also find that I have to test it with

all(xgrid<=5 & xgrid>=1)