[Octave-bug-tracker] [bug #52176] contourf() does not enforce size compatibility

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?52176>

                 Summary: contourf() does not enforce size compatibility
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Fri 06 Oct 2017 11:46:04 AM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Missed Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: William Rosenthal
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Microsoft Windows

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Details:

ERROR: contourf(x,y,f) plots without error an array f which is smaller in at
least 1 dimension than the length of the coordinate vectors x and y.

IMPACT: This results in unexpected behavior, because it is not obvious whether
the function will pad the plot with white space, pad the array with zeros, or
truncate the excessive x or y vector. It also is not obvious whether the
function will align the array with the first or last values of the excessive x
or y vector. The lack of precise input checking also allows dimension mismatch
issues to persist, and makes overall debugging more difficult.

MINIMAL EXAMPLE: This code should, but does not, throw an error citing
dimension mismatch between the array A and one or more of the coordinate
vectors x and y:

clc, clear all, close all
A = zeros(100,99);
for j = 1:100, for k = 1:99, A(j,k) = j + 2*k; end, end
x = (1:100)';
y = (1:100)';
contourf(y,x,A), colorbar, xlabel('x'), ylabel('y')





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