How to add annotations to a plot by accessing data from a table?
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I have a table with a combination of strings and numbers as follows:
A 0 1
B 5 0
C 0 1
D 0 0
E 3 4
This table is used to add annotations to a plot. The idea is to display rows with non zero values in it, i.e., in plot 1, I need to display B-5, E-3 and in plot 2, A-1, C-1, E-4, as shown in the image below.
Can someone suggest a way for doing this in matlab? Thanks in advance!!
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Answers (1)
Cris LaPierre
on 8 Sep 2019
If you need it to be automated, use logical indexing to identify which rows contain non-zero entries. Here's a quick attempt:
% create the initial plots
theta = 0:0.1:2*pi;
siny = sin(theta);
cosy = cos(theta);
subplot(1,2,1)
plot(theta, siny)
subplot(1,2,2)
plot(theta,cosy)
% Now add text
for p = 2:width(dispTxt)
idx = dispTxt{:,p} > 0;
txt = sprintf("%s-%s\n",[dispTxt{idx,1},dispTxt{idx,p}]');
% Select desired subplot
subplot(1,2,p-1)
xlim([0 8])
text(7,-0.5,txt)
end
Of course, you could also add the text at the same time you are creating the plots.
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Cris LaPierre
on 8 Sep 2019
BTW, dispTxt is a table containing the values you showed in your question.
T = ["A" "B" "C" "D" "E"];
V1 = [0 5 0 0 3];
V2 = [1 0 1 0 4];
dispTxt = table(T',V1',V2')
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