Switch columns in a matrix without a loop
for exchanging two columns 3 - 9 : A = randi(20,4,10); % A random 4 by 10 matrix of integers A(1,:)=[1 2 3 4 5 6 7 ...

7 years ago | 0

I WANT TO SOLVE THE EQUATION for x: x*exp(x)=(a1-x)*a2*a3 . Here a1 and a3 are matrices and a2 is a constant. I cant solve the equation using solve
True, indeed. Not only for (A,B) = (11,13) and (3,-6), but for a wide range of other set, including the given coefficients.....

7 years ago | 0

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I WANT TO SOLVE THE EQUATION for x: x*exp(x)=(a1-x)*a2*a3 . Here a1 and a3 are matrices and a2 is a constant. I cant solve the equation using solve
The equation you wrote is x*exp(x)=(a1-x)*a2*a3 y= x*exp(x)-(a1-x)*a2*a3 y= x*exp(x)-a1*a2*a3 +x*a2*a3 Let: a1*...

7 years ago | 0

how to find the sum terms in of binomial expansion
The general steps to find such a summation are: - Start a loop over r, - Calculate each term as a function of (r), - I...

7 years ago | 1

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how do i display this particular matrix in a separate text file in the below mentioned format?
Use the code below after adding your filename with its path: clc clear filename = 'your_filename.txt'; ...

7 years ago | 0

sum(w) and ones(1,size(w,2))*w' results totally different numbers
The line ones(1,size(w,2))*w' means creating a ones matrix with dimensions (1,size(w,2)) multiplied with w', and ...

7 years ago | 0

How to input a matrix of unknown dimensions into a function?
A is an input argument passed from function call function_name(A). SO, DELETE THIS LINE from the beginning, you do not need to i...

7 years ago | 0

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Why the loop return only the last element ?
It is a little tricky how loops are working in any program, aren't they? You used subplot and set and get within the same loop, ...

7 years ago | 0

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MATLAB solve function is taking a very long time
Sometimes trying the (simplify) command successively after each solve command, helps making the syms math incredibly faster. It ...

7 years ago | 0

i've an image of size 185x256 and i've divided the image into discrete blocks having block rows 16 and block columns 16. when i access the blocks in a loop it says index exceeds matrix dimension...
Just add clear at the very top of the code. Also these issues: Line 26: change (oneBlocl) to (oneBlock) Li...

7 years ago | 0

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how to plote 3 variable on 2D plot
But the single x-axis can't hold more than one variable, unless: * The two (or more) variables have the same units, as the r...

7 years ago | 0

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2d index to 3d array
First note that adding a third dimension that is interpreted as (color) in a grayscale (2-D matrix) image is a logically false t...

7 years ago | 0

Subscripted assignment dimension mismatch.
In the line C=-n.*sqrt(pi.*k./(2.*R(mg))).*besselj(n+0.5,k.*R)+k.*sqrt(pi.*k.*R(mg)./2).*besselj(n-0.5,k.*R(mg)); use R...

7 years ago | 0

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Number of lines in a txt file (empty lines computed)
Check this out: E=textread('Your_File.txt','%s', 'delimiter', '\n'); % reads strings, white-space or delimiter-sepa...

7 years ago | 0

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matlab to excel back to matlab
So you want to write a program in Matlab that writes 3 values in 3 cells in an Excel file? OR you need to read 3 cells from an e...

7 years ago | 0

How to find parameters of a time series by MLE
Hi. The equation listed in the figure appears so uneasy to handle. That is true since it has cyclic-like behavior with three...

7 years ago | 1

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Read in File with Letter, Number, and Quotation Marks
f=fopen('Your_File','r'); Readings=fscanf(f,'c',[1,inf]); then change the contents of (Readings) either to numbers using...

7 years ago | 0

can change the name of txt. file not manually
If your filenames are part1_1.txt, part1_2.txt, part1_3.txt.. etc., and intersect_1.txt, intersect_2.txt.. etc., and w...

7 years ago | 0

How to update the variable of a function using a dialogbox?
Try the (while) loop with simple criterion, as: clear all; close all; prompt = {'CORRELATION SIZE:'}; ...

7 years ago | 1

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Ploting 3D flow data (4D plot)
Logically, no 4-D plot can be made sensible to us (unfortunately, we are stuck to see and understand 3-D world, only). So even i...

7 years ago | 0

How I can extend this function
The function you wrote above has an error at I = 1:1:6; it should be I = 0:1:6; % or simply I = 0:6; ...

7 years ago | 0

-log(SNR) does it make any difference?
Easily decompose the log argument! For any (ratio) R=S/N, then (please note that I highlighted the math formulas like codes, yet...

7 years ago | 0

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Error in using while loop?
Please do not use ( less than as < or greater than as > ) when using symbolic math. Instead use: while (gt(m,iter) && (lt...

7 years ago | 0

plot function Too many input arguments.
This function works fine and nothing's wrong, it worked here correctly. The output_noise is (1 by 3000) and its maximum is ~ 1 e...

7 years ago | 0

How to move a point on x-axis
Try the following, and modify is needed: close all axis ([0 20 0 40]) hold for x=0:20 plot(x,0,'...

7 years ago | 0

How to convert an GF(Galio Field) array to uint8 array?
If it was (Galois) Field, used in advanced fields as cryptography and coding theory, please seek the reference page: < http...

7 years ago | 0

how to convert gray scale image into rgb image?
Use colormap types, since you are interested with a colored region of interest, I think any colormap format suffices. Example: ...

7 years ago | 1

how to put the obtained 'k' value in a separate array?
Simply use D1= overload(k) If (k) was not a positive integer you cannot use it as a matrix index. It is the function ...

7 years ago | 0

how to assign a variable using a string
Try (genvarname) with (eval) functions. Example (alter the example below to your use, i.e., instead of eval([b]) use eval([b = '...

7 years ago | 0