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How to use set(h, 'XData', x...) when x is datetime or duration?

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Mingqian Chen
Mingqian Chen 2022-2-12
评论： Mingqian Chen 2022-2-12
Hello Guys,
I have large size csv-table with timestamp and data, i want to plot it in a better way with function set(h, 'XData', ...). After reading this page How should I update the data of a plot in Matlab? - Stack Overflow i have wrote the following approach:
tic
t = readtable('data_Mat1_2022_02_11_23_31.csv');
ax = axes;
h = plot(nan, nan);
x = t.Time;
y = t.Data;
set(h, 'YDataSource', 'y');
set(h, 'XDataSource', 'x')
n = height(t);
for i = 1:n
set(h, 'XData', x, 'YData', y);
end
toc
But when i run my code there will be the error:
Error using matlab.graphics.chart.primitive.Line/set
Value must be a vector of numeric type.
Error in plotTime (line 13)
set(h, 'XData', x, 'YData', y);
So i want to konw how to correct my code or there is another efficient way to update plot of a table, thanks for all your helps!
  1 个评论
Mingqian Chen
Mingqian Chen 2022-2-12
Ran in:
I do a little change to my code and it works
tic
t = readtable('data_Mat1_2022_02_11_23_31.csv');
ax = uiaxes;
Error using uiaxes (line 47)
This functionality is not available on remote platforms.
x = t.Time;
y = t.Data;
toc
tic
%plot(t.Time, t.Data)
h = plot(ax, x(1), y(1));
set(h, 'YDataSource', 'y');
set(h, 'XDataSource', 'x')
n = height(t);
set(h, 'XData', x, 'YData', y);
toc
Output
Elapsed time is 0.208487 seconds.
Elapsed time is 0.006211 seconds.
Maybe the bottleneck is the time of reading table

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