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annotate spyh.m @ 577:e45c9b56d50d feature/grids

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Add an Empty grid class The need turned up for the flexural code when we may or may not have a grid for the open water and want to plot that solution. In case there is no open water we need an empty grid to plot the empty gridfunction against to avoid errors.
author Jonatan Werpers <jonatan@werpers.com>
date Thu, 07 Sep 2017 09:16:12 +0200
parents 12db86a8ec7b
children
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5cb99f56f55e Added some utility functions. Improved some documentation.
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1 % spyh mimics the built in spy but returns a handle which allows modifying the plot.
5cb99f56f55e Added some utility functions. Improved some documentation.
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2 function h = spyh(A)
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3 [n,m] = size(A);
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4 [I,J] = find(A);
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5
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6 if ~isempty(J)
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7 h = plot(J,I);
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8 h.LineStyle = 'none';
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9 h.Marker = '.';
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10 h.MarkerSize = 14;
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11 else
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12 h = [];
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13 end
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14
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15 a = gca;
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16 xlim([0 m+1]);
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17 ylim([0 n+1]);
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18 axis square
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19 a.YDir = 'reverse';
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20 end