MATLAB program which computes the mean and standard deviation of the data. Use FOR LOOPs.

Posted in matlab

Thursday, August 7, 2014 By Anonymous

We can generate a set of data with a random values about some

mean value with the command

num=100;

spr=0.1;

data=5.0+spr*sign(1.0-2.0*rand(1,num)).*rand(1,num)

a) What is the last line doing?

b) Write a MATLAB program which computes the mean and standard deviation of the data. Use FOR LOOPs.

Solution:

function Question9()

num = 100;

spr = 0.1;

data = 5.0 + spr * sign(1.0 - 2.0 * rand(1,num)) .* rand(1,num); %according to as per given

Total=0;

Size = size(data);

for i=1 : Size(2)

Total = Total + data(i);

end

Mean = Total/num; %getting mean

Sum = 0;

for i=1 : Size(2)

Sum = Sum + ((data(i) - Mean) ^ 2);

end

SD = sqrt(Sum / (num-1));

fprintf('Mean of Data: %.2f \n', Total/num);

fprintf('SD of data %.2f \n', SD); %printig output

end

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