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# rifat

Last seen: 4 months ago Active since 2013

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How can I select a random element in a row of matrix?
Assuming the data is in 'row' col=1+floor(rand()*length(row)) % column number of the randomly selected element ele...

7 years ago | 0

greek symbols in matlab figures
plot([1 2 3],[1 2 3]); xlabel('\mu') ylabel('\nu') title('\sigma')

7 years ago | 2

FINDING FREQUENCY AND AMPLITUDE OF A SINUSOID FROM DATA POINTS.
len=length(signal); fs=50 % assuming you know the sampling frequency of your signal n=0:len-1; N=n*fs/(len-1); % conv...

7 years ago | 0

Help me how to calculate sum of series ?
You can not add infinite number of terms. If the sum is a converging sum, then you can add a large number of terms (e.g. n=5000)...

7 years ago | 3

delete same number every two number while keeping the original order
a(end+1)=a(end)+1; x=diff(a); p=find(x~=0); a=a(p)

7 years ago | 0

How to plot multiple iterations on the same axes?
first, write figure; hold on; then use a loop. witing each iteration plot your curve. plot(s_x_index,f_x)

7 years ago | 0

How do i add all the values which i get using eval function?
prompt = {'Enter the forces(kN): '}; title = 'Environmental forces'; answer = inputdlg(prompt,title); f = str2num(ans...

7 years ago | 0

How to give axis labels in plotyy comand while it is used in subplot(2.1.1)...........
x = 1:5; y1 = 1:5; y2 = 5:-1:1; figure subplot(2,1,1) [ax h1 h2]=plotyy(x,y1,x,y2); ...

7 years ago | 0

Problem with subplotting the results
you are using i as an index, then displaying it as an image using imshow.. what it 'i'? If it is an image, then use a different ...

7 years ago | 0

Why does it gives matrix dimension must agree?
You are not dividing element by element. Use the following lines instead: R=3e-7:1e-7:10e-7; V=0.5; Vth=0.011*V+(1.3e...

7 years ago | 1

how do i use the values read by the eval function in other formulas?
prompt = {'Enter the forces(kN): '}; title = 'Environmental forces'; answer = inputdlg(prompt,title); f = str2num(ans...

7 years ago | 0

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Fast way to read text file of formatted data
I did a similar thing before. Hope this helps. result will be on the variable mat. fclose('all'); fid=fopen('fileNam...

7 years ago | 0

how to store value from loop
Your index isnt integer.. Use the following modification. And your program isnt self sufficient for me to execute. idx = ...

7 years ago | 0

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How do I perform numerical integration containing multiple variables?
Since it is not a double integral, you want to integrate f(x,y) at a particular value of y=y1. Evaluate the function at y=y1. Th...

7 years ago | 0

String value and sequently representation
M=['XASSANORXOOUOU']; for i=1:length(M)/2 string=['L' num2str(i) '=M(2*(i-1)+1:2*i)'] eval(string) end...

7 years ago | 0

String value and relate with number.
A=21;B=12;C=8;D=7; W=['DABCD']; Z=W(1:3); string=[Z(1) '*' Z(2) '*' Z(3)]; eval(string)

7 years ago | 0

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How to read data from xml files? (Loop all Parent and child nodes and get entire data to Excel)

7 years ago | 0

How can I perform QPSK modulation of an .mp3 / .wav file ?
sounds like an assignment problem. anyway... 1. read file using wavread() 2. use modulate() to apply QPSK modulation 3. use ...

7 years ago | 0

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Received signal not on sampling time
I think the following script should do the work: signal_vector= [1 1 1 1 1]; % Define your signal here Ts=1/50; % Define...

7 years ago | 0

How can I find a connected path on a matrix by Random Search?
Hope the following function helps. function[]= randSelection(mat) [r c]=size(mat); list=1:c; for ...

7 years ago | 0

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How to determine significant wave height from time series data in Matlab>
I dont know what it means by "significant wave height". But if you are trying to detect the peaks in a time series then try the ...

7 years ago | 0

how to make the output from a for loop displayed in an horizontal pattern
Use fprintf() instead of disp() within for loop. For example, fprintf('%d ',z);

7 years ago | 1

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need to convert excel (time domain data ) to frequency domain data
Assuming the Excel file contains time data in column 1 and acceleration data in column 2 % read data data=xlsread('fileN...

7 years ago | 0

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How to separate noise from signal?
You can pass your signal through a bandpass filter centered around the frequency of your original (without noise) output and adj...

8 years ago | 0

Changing variable in a looped code
for i=1:3 string=['plot(x' num2str(i) ',y);']; eval(string); end I think this will do

8 years ago | 0

How we can convert negative float value into binary in matlab? Is there any direct command for this?
You can consider two things. 1. consider changing the quantization of the number and convert the numbers into int16 format wh...

8 years ago | 0