Error using subplot (line 301) Index exceeds number of subplots.

Question

farhat khan 2019-7-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/473292-error-using-subplot-line-301-index-exceeds-number-of-subplots

回答： Walter Roberson 2019-7-24

ax = gobjects(imageset.Count,1);
for ii =  1:imageset.Count
  ax(ii) = ...
  subplot(floor(sqrt(imageset.Count)),ceil(sqrt(imageset.Count)),ii);          %Error show me on this line
	[~,currName] = fileparts(imageset.ImageLocation{ii});
	imshow(read(imageset,ii))
	title([num2str(ii),') ' currName],...
		'interpreter','none','fontsize',7)
end
expandAxes(ax);

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Star Strider 2019-7-24

The error message is straightforward.

Your ‘ii’ index is greater than floor(sqrt(imageset.Count)) * ceil(sqrt(imageset.Count)).

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Answer 1

Walter Roberson 2019-7-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/473292-error-using-subplot-line-301-index-exceeds-number-of-subplots#answer_384631

在 MATLAB Online 中打开

>> t = 1:100;
>> find(floor(sqrt(t)).*ceil(sqrt(t)) < t)
ans =
  Columns 1 through 25
     3     7     8    13    14    15    21    22    23    24    31    32    33    34    35    43    44    45    46    47    48    57    58    59    60
  Columns 26 through 45
    61    62    63    73    74    75    76    77    78    79    80    91    92    93    94    95    96    97    98    99

For example, suppose the Count is 8, then sqrt(8) is between 2 and 3, so the floor() is 2 and ceil() is 3, and 2*3 = 6, which is less than 8, so when you tried to plot for the 7th you would run out of subplots.