scatter plot in matlab

Question

Ying 2012-1-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/26251-scatter-plot-in-matlab

Hi,

I'm new to Matlab. And I need to write a congruential random number generator without using RAND().And then plot the Ui vs Ui+1

My code is:

>> syms m x a u z;
>> x=1;
>> a=16807;
>> m=2^31-1;
>> for i=1:10
y=a*x
x=mod(y,m)
u(i)=x/m %store u value
end;
>> for i=1:10
end;
>> scatter(u(i+1),u(i))

I got this"Index exceeds matrix dimensions." error message.

Anyone who can tell me how to plot my ui vs ui+1? I think my code does generate correct ui values.

I'm using it for tomrrow's class.

Thanks very much!

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Answer 1

the cyclist 2012-1-16

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在 MATLAB Online 中打开

I think you should be able to do the scatter plot you want using:

scatter(u(2:end),u(1:end-1))

The reason you got the error you did is that i is equal to 10, so in the scatter command you are trying to access the ( i+1 )th element of u. But u is only a 10-element vector, of course.