Plot data in loop with num2str
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Hi all,
I want to plot a dynamic figure by plotting the sixth column of the datasets Meteo1752 to Meteo1966:
balyr=1752;
endyr=1966;
for k = balyr:endyr
balanceyear(k-balyr+1,:)=k;
plot(['Meteo' num2str(k) '(:,6)']);
end
However, the error says
Error using plot
Invalid first data argument.
What am I doing wrong?
Thanks
2 个评论
Adam
2018-7-23
编辑:Adam
2018-7-23
doc plot
tells you what the valid data types are for the inputs. plot expects numeric data arguments (or an axes handle as first argument). You are giving it a string.
You'll have to give your actual data to the plot instruction, and probably you will need to use
doc hold
too.
Stephen23
2018-7-24
@yoni verhaegen: what you are trying to do is not recommended. Read this to know why:
It is easy to avoid this situation: usually some indexing is the key.
回答(2 个)
Dimitris Kalogiros
2018-7-23
If you want to display something on your workspace, use disp() instead of plot()
balyr=1752;
endyr=1966;
for k = balyr:endyr
balanceyear(k-balyr+1,:)=k;
%plot(['Meteo' num2str(k) '(:,6)']);
disp(['Meteo' num2str(k) '(:,6)']);
end
0 个评论
dpb
2018-7-23
编辑:dpb
2018-7-23
Several things...the specific error is trying to plot() a string; ML will not do character substitution like that.
The more fundamental issue is in having created the multiple variables with sequential names; as you've just discovered, now you have a problem in addressing them.
See the FAQ that talks about how to avoid the problem; we don't know how these were created so the best way to choose isn't clear.
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