How to reduce the file size of a saved histogram figure
조회 수: 3(최근 30일)
표시 이전 댓글
In the following code, I have a histogram showing 100 bins, therefore the amount of data shown in this figure is quite small. However, the file saved is about 154 MB, and using the "compact" option it is still 77 MB.
Therefore, it seems the figure still contains the original data, which can indeed be seen using the Property inspector (see attachment).
Is it possible to save only the histogram data, and not the original data, such that the file saved has a minimal size?
x = randn(10^7,1);
h = figure;
savefig(h, "test2.fig", "compact")
댓글 수: 0
Steven Lord 2022년 9월 20일
You could avoid creating the histogram using the data by specifying 'BinCounts' and 'BinEdges'. If you do this, there won't be a way to retrieve the original data from the histogram the way you could if you created it by passing the unbinned data into the function, nor would you be able to manipulate it using functions like morebins or fewerbins or by manually changing some of the bin related properties.
Create a histogram from data
x = randn(10^7,1);
f = figure;
h = histogram(x, 100);
Create a histogram from counts and edges
f2 = figure;
[values, edges] = histcounts(x, 100);
h2 = histogram('BinCounts', values, 'BinEdges', edges);
Show the sizes of the files
D = dir('*.fig');
for thefile = 1:numel(D)
fprintf("File %s has size %d.\n", D(thefile).name, D(thefile).bytes)
Try manipulating the count-and-edges histogram
f3 = figure;
h3 = histogram('BinCounts', values, 'BinEdges', edges);
morebins(h3) % This will error
Rik 2022년 9월 20일
편집: Rik 2022년 9월 20일
You have two options that I'm aware of:
- Change the underlying data so you reproduce the same bins with fewer data points.
- Change to a bar chart (use histcounts to extract the counts per bin).
Find more on Data Distribution Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!