Given n samples of 100,how do we generate these random samples in the line segment below using matlab
line_segement:
x between -1 and 1, y=2
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Do you want generate n random sample (values) between -1 and 1? – il_raffa Oct 18 '15 at 16:16
1 Answers
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If you want to generate n random samples between to given limit (in your question -1 and 1), you can use the function rand.
Here an example:
% Define minimum x value
x_min=-1
% Define maximum x value
x_max=1
% Define the number of sample to be generated
n_sample=100
% Generate the samples
x_samples = sort(x_min + (x_max-x_min).*rand(n_sample,1))
In the example, the sort function is called to sort the values in order to have an ascendent series.
x_min and (x_max-x_min) are used to "shift" the series of random values so that it belongs to the desired interval (in this case -1 1), since rand returns random number on an open interval (0,1).
If you want to have a XY matrix composed by the random samples and the defined constant y value (2):
y_val=2;
xy=[x_samples ones(length(x_samples),1)*y_val]
plot([x_min x_max],[y_val y_val],'linewidth',2)
hold on
plot(xy(:,1),xy(:,2),'d','markerfacecolor','r')
grid on
legend({'xy segment','random samples'})
(in the picture, only 20 samples have been plot to make it more clear)
Hope this helps.
