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How to calculate average of each column on a test file

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Naomi Penelope
Naomi Penelope 2021-7-8
评论： Steven Lord 2021-7-8
How do i calculate the average of each column from a text file, and after having the two average of X,Y coordinates how do I plot the point

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回答（1 个）

Steven Lord
Steven Lord 2021-7-8
Read the data into MATLAB.
Use the mean function.
Call the plot function.
  2 个评论
Naomi Penelope
Naomi Penelope 2021-7-8
I was able to find the average. but how do i plot a single point with x and y coordinates?
Steven Lord
Steven Lord 2021-7-8
Ran in:
There are several different ways. Since in the case you describe your single point is unlikely to be exactly one of the points in your data set a simple way is to use hold on.
xy = rand(10, 2);
m = mean(xy, 1);
scatter(xy(:, 1), xy(:, 2), 'ro'); % You could also use plot here
hold on % So the subsequent plot call doesn't reset the axes
plot(m(1), m(2), 'kx')
Alternately you could use one call to plot to create two lines.
figure
plot(xy(:, 1), xy(:, 2), 'ro', m(1), m(2), 'kx')

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