how to show difference between two plotted data in graph ?

2020 10 22
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更新时间：2020 10 22
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Hi all:
i plotted two series of data in graph now i want to differentiate between two graphs so i want to know difference of these two graphs in ploting by numerical data .
i mean what difference come between these two graphs it will show me numerically in graph .
d=[120 234 499 324 567 343 550 405 600 700]
m=[123 456 789 456 765 867 989 675 867 433]
figure
plot(d)
hold on
plot(m)
xlabel('solar radition ')
ylabel('haat gain')
legend('heat gain')
title('uuseful heat gain')
thanks in advance

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Mario Malic
Mario Malic 2020-10-22

1 个投票

Do you mean difference by this?
c = m-d
plot(c)

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thanks dear from your reply i am very tahnkful .
no i mean i dont want to plot third graph of difference i want to just show difference in numerical data in that plot (which d and m is already plotted)
thanks
Mario Malic
Mario Malic 2020-10-22
c = m-d;
xc = 1:1:length(m);
yc = (m+d)/2;
text(xc,yc,string(c), 'HorizontalAlignment', 'center')
Engineer Batoor khan mummand
编辑：Image Analyst 2020-10-22
Thanks dear from your reply.
This is my code:
d=[120 234 499 324 567 343 550 405 600 700]
m=[123 456 789 456 765 867 989 675 867 1000]
figure
plot(d)
hold on
plot(m)
c = m-d;
xc = 1:1:length(m);
yc = (m+d)/2;
text(xc,yc,string(c), 'HorizontalAlignment', 'center')
xlabel('solar radition ')
ylabel('haat gain')
legend('heat gain')
title('uuseful heat gain')
It gives me this error:
Error using text
Invalid parameter/value pair arguments
Error in ndfsde (line 10)
text(xc,yc,string(c), 'HorizontalAlignment', 'center')
Mario Malic
Mario Malic 2020-10-22
I do not know how to check documentation for 2017a, so, please check your text function, if 'HorizontalAlignment', 'center' is a valid option and check if string(c) outputs 1x10 string array.
Image Analyst
Image Analyst 2020-10-22
Try this:
d = [120 234 499 324 567 343 550 405 600 700]
m = [123 456 789 456 765 867 989 675 867 1000]
plot(d, '-', 'LineWidth', 2)
hold on
plot(m, '-', 'LineWidth', 2)
grid on;
differences = m - d;
xCenter = 1:1:length(m);
yCenter = (m+d)/2;
for k = 1 : length(xCenter)
textLabel = sprintf('%.1f', differences(k));
text(xCenter(k), yCenter(k), textLabel, 'HorizontalAlignment', 'center')
end
xlabel('Solar Radiation ')
ylabel('Heat gain')
legend('d', 'm', 'Location', 'south')
title('Useful Heat Gain')
Note that the differences are vertical. It doesn't make any sense to have a slanted difference line (between two different time points) like you had.

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