can you pls help in solving the following question for random variables:

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kratika kanherkar 2016-8-3

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评论： kratika kanherkar 2016-8-6

Generate 10 uniform random variables within the range 0 and 2 and evaluate their sum and sketch the pdf for resulting random variable

&

Generate 10 exponential random variable with lambda=2 and evaluate their sum.

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Answer 1

Image Analyst 2016-8-5

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编辑：Image Analyst 2016-8-5

For the first question on uniform numbers, see the help for rand() - the answer is one of the examples.

For sketching the PDF, see histogram(), particularly the 'pdf' option.

for the exponential numbers, see the help for random() in the Statistics and Machine Learning Toolbox, if you have that. Exponential is one of the distributions you can select.

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kratika kanherkar 2016-8-6

Thanks a lot !!

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Answer 2

Jan Jarosz 2016-8-5

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编辑：Walter Roberson 2016-8-5

在 MATLAB Online 中打开

u = 2*rand(10,1);
usum = sum(u); %uniform rv
lambda = 2;
e = exprnd(1/lambda,10,1);
esum = sum(e);%exponential rv

The pdf will always be f(x)=0.5, 0<x<2 for the uniform distribution and 2*exp(-2*x) for the exponential distribution. You can plot histograms with hist(u) and hist(e)