how to show difference between two plotted data in graph ?

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

Answer 1

[Mario Malic]

Do you mean difference by this?

c = m-d
plot(c)

[Engineer Batoor khan mummand]

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

[Engineer Batoor khan mummand]

like this example

[Mario Malic]

c = m-d;
xc = 1:1:length(m);
yc = (m+d)/2;
text(xc,yc,string(c), 'HorizontalAlignment', 'center')

[Engineer Batoor khan mummand]

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]

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]

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.