Problem with multiple values on plot

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Catherine 2017-2-28

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https://ww2.mathworks.cn/matlabcentral/answers/327251-problem-with-multiple-values-on-plot

评论： David Goodmanson 2017-2-28

采纳的回答： David Goodmanson

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Hi guys, I am having problem with repeated values on my plot.

Here is my code regarding the plot:

plot(L_value,Temp_Lfile)
title('Intensity profile','fontsize',18)
xlabel('Wavelength (nm)','fontsize',18)
ylabel('Intensity','fontsize',18)
set(gca,'fontsize',18)
[L_pks,L_locs] = findpeaks(Temp_Lfile);
L_val = L_value(L_locs);
text(L_val,L_pks,num2str(L_val),'fontsize',12);

Both my L_val and L_pks variables are only 1x8 matrix. So, there should only be 8 numbers on the plot. Which part of my code is incorrect?

Thanks guys!

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KSSV 2017-2-28

Have you tried with [L_pks,L_locs] = findpeaks(L_value,Temp_Lfile); ?

Catherine 2017-2-28

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Hi KSSV, thanks for your reply. Here is the error message if I did what you suggested:

Error in findpeaks (line 59)
[X,Ph,Pd,Th,Np,Str,infIdx] = parse_inputs(X,varargin{:});
Error in Simulation_L_fix_mica (line 86)
[L_pks,L_locs] = findpeaks(L_value,Temp_Lfile);

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Answer 1

David Goodmanson 2017-2-28

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/327251-problem-with-multiple-values-on-plot#answer_256597

编辑：David Goodmanson 2017-2-28

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Hello Catherine, The last line will probably work if changed to

text(L_val,L_pks,num2str(L_val'),'fontsize',12);

this is because num2str of a row vector is one long string, which gets reused every time. num2str of a column vector is a column matrix of shorter strings, so text cycles through them.