MATLAB: Plotting cell array with empty data colums

cell arrayplot

I've gotten along to debugging my plotting function. Fisrt up to 6 raw multi-data type files are loaded. Then for one parameter, I have up to 6 stored in a cell (x1,y1,x2,y2,…etc), depending on which of the origial files need to be plotted.

I may end up with a cell array like: x1 y1 [] [] x3 y3 x4 y4 [] [] [] []

When I plot, I expect it to plot just x1, y1, x3, y3, x4, y4. When I just have one data set in the array, no matter its poition, everything is fine. If I plot multiple files, I experience odd results.

Best Answer

plot(f{~cellfun(@isempty,f)});

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MATLAB: Plotting cell array with empty cells – changing linespec

If you use:

f{~cellfun(@isempty, f)}

The empty cells are not ignore, but they are not forwarded to PLOT at all. PLOT has no information, that there have been empty cells before.

Instead of removing the empty cells, you could insert Inf values. They are considered by PLOT, but do not produce a visible line.

BTW. cellfun('isempty', C) is much faster than cellfun(@isempty, C).

MATLAB: Plotting a cell

If your line style and marker and color can be represented using the standard short encoding such as 'r--o' then use triples, as if from executing

f{1} = x1;
f{2} = y1;
f{3} = linespec1;  %eg., 'b--o'
f{4} = x2;
f{5} = y2;
f{6} = linespec2;  %eg., 'r--s'

Then

plot(f{:})

However, if your specifications cannot be encoded in this form, such as if you wish to use a color other than 'b' 'c' 'g' 'k' 'm' 'r' 'w' 'y', then it is not possible to do everything in just one plot() call. In such a case, encode what you can in the f cell array, then

h = plot(f{:});

Then set() the properties of the lineseries handles returned:

set(h(1), 'Color', [0.2 .8 .5])  %example

set(h(2), 'Color', 'g');         %example

Best Answer

Related Solutions

MATLAB: Plotting cell array with empty cells – changing linespec

MATLAB: Plotting a cell

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