Answered
How to compute the short time Fourier transform of a signal z(n) in a time frame that is centered at n?
The Short time Fourier transform use overlapping fragments of the signal, the computed transformations are concatenated into sin...
How to compute the short time Fourier transform of a signal z(n) in a time frame that is centered at n?
The Short time Fourier transform use overlapping fragments of the signal, the computed transformations are concatenated into sin...
11 years ago | 0
| accepted
Answered
orientation of static text
I think this solution will work plot(randn(100,1)); h=text(1,1,' My description'); set(h,'Rotation',60); The text...
orientation of static text
I think this solution will work plot(randn(100,1)); h=text(1,1,' My description'); set(h,'Rotation',60); The text...
11 years ago | 3
Answered
How can I add the values of each iteration of a for loop, where the index is k=0:0.001:.30, into a matrix so that I can plot the values?
If H is scalar you can vectorize the problem : k=0:0.001:0.30; H=2; y=3.065-(8.871*(k/H))+(14.036*(k/H).^2)-(7.219*(k/H...
How can I add the values of each iteration of a for loop, where the index is k=0:0.001:.30, into a matrix so that I can plot the values?
If H is scalar you can vectorize the problem : k=0:0.001:0.30; H=2; y=3.065-(8.871*(k/H))+(14.036*(k/H).^2)-(7.219*(k/H...
11 years ago | 0
| accepted
Answered
visualizing a matrix using imagesc
You can sample the matrix with higher Frequency rate or use the following technique : imshow(M,'notruesize'); Using th...
visualizing a matrix using imagesc
You can sample the matrix with higher Frequency rate or use the following technique : imshow(M,'notruesize'); Using th...
11 years ago | 0
| accepted
Answered
How can we divide an image into 16 sub images each of size 128x128
you can select a block as : P=(512)/sqrt(16); B11=M(1:P,1:P); B12=M(1:P,P+1:2*P); %... B14=M(1:P,3*P+1:4*P); %... ...
How can we divide an image into 16 sub images each of size 128x128
you can select a block as : P=(512)/sqrt(16); B11=M(1:P,1:P); B12=M(1:P,P+1:2*P); %... B14=M(1:P,3*P+1:4*P); %... ...
11 years ago | 0
Answered
number of nearest neighbous around each element of a matrix
This problem can be solved using the equation of radius in three dimensional space such as if x²+y²+z² < R² then the point is in...
number of nearest neighbous around each element of a matrix
This problem can be solved using the equation of radius in three dimensional space such as if x²+y²+z² < R² then the point is in...
11 years ago | 0
Answered
hi i have mean and standard deviation in one image now i want to find entropy for RGB color and skewness..
To find the entropy, you have two ways, using predefined function or by programming : H=imread('autumn.tif'); % RGB sample ...
hi i have mean and standard deviation in one image now i want to find entropy for RGB color and skewness..
To find the entropy, you have two ways, using predefined function or by programming : H=imread('autumn.tif'); % RGB sample ...
11 years ago | 0
| accepted
Answered
Plot the integral of a discrete function
Trapz function returns a scalar value, numeric primitive can be calculated using the following function : function itg=inte...
Plot the integral of a discrete function
Trapz function returns a scalar value, numeric primitive can be calculated using the following function : function itg=inte...
11 years ago | 0
Answered
How can I create following matrix using code
try : N=3; A1=[ones(1,N);zeros(2,N)]; A2=[zeros(1,N);ones(1,N);zeros(1,N)]; A3=[zeros(2,N);ones(1,N)];
How can I create following matrix using code
try : N=3; A1=[ones(1,N);zeros(2,N)]; A2=[zeros(1,N);ones(1,N);zeros(1,N)]; A3=[zeros(2,N);ones(1,N)];
11 years ago | 0
Answered
How do I plot the data as patches rather than vertices in a grid or a mesh?
Tensor product can be efficient in representing each number with different color, but try this way i think it is convenient to y...
How do I plot the data as patches rather than vertices in a grid or a mesh?
Tensor product can be efficient in representing each number with different color, but try this way i think it is convenient to y...
11 years ago | 0
Answered
What do the components of eigenvector represent?
N dimensional matrix is associated with N dimensional canonical base, in this case N=2, you have a plane (x,y), after eigendecom...
What do the components of eigenvector represent?
N dimensional matrix is associated with N dimensional canonical base, in this case N=2, you have a plane (x,y), after eigendecom...
11 years ago | 0
Answered
Quickly create a vector of ones and zeros
vectorization is possible : N=10; vec=zeros(N,1); positions=[2:4]; vec(positions)=1;
Quickly create a vector of ones and zeros
vectorization is possible : N=10; vec=zeros(N,1); positions=[2:4]; vec(positions)=1;
11 years ago | 5
| accepted
Answered
What is the difference between functions imhist and hist?
Imhist function is designed to work with images which can have different numeric types such as uint8, uint16, while hist is for ...
What is the difference between functions imhist and hist?
Imhist function is designed to work with images which can have different numeric types such as uint8, uint16, while hist is for ...
12 years ago | 0
| accepted
Submitted
Wigner's Semicircle Law
Wigner's semicircle law : modelling the distribution of the eigenvalues of symmetric random matrix.
12 years ago | 1 download |
Answered
How to create a vector in which numbers increase at first, then remain constant, then reduce back to 1 ?
To accomplish this task without loop, you need two variables, the maximum value m and the number of redundancy n : First exam...
How to create a vector in which numbers increase at first, then remain constant, then reduce back to 1 ?
To accomplish this task without loop, you need two variables, the maximum value m and the number of redundancy n : First exam...
12 years ago | 0
Answered
What is norm 2 function ?
norm(X,2) returns the largest singular value, in your case , i propose that you test with the three existing norms : Forbenius,...
What is norm 2 function ?
norm(X,2) returns the largest singular value, in your case , i propose that you test with the three existing norms : Forbenius,...
12 years ago | 0
Answered
How to create a 2d colormap having temperature reading at specific Longitudes and Latitudes
Cristina, Here is an alternative approach, the third column represents the color, but it is not easy to create a color map ( ...
How to create a 2d colormap having temperature reading at specific Longitudes and Latitudes
Cristina, Here is an alternative approach, the third column represents the color, but it is not easy to create a color map ( ...
12 years ago | 0
Answered
Trying to finish code for numerical integration on matlab but keep getting error
hi Sarah, First there is a problem with the input, you have to define the range x then the function input, R represents the bou...
Trying to finish code for numerical integration on matlab but keep getting error
hi Sarah, First there is a problem with the input, you have to define the range x then the function input, R represents the bou...
12 years ago | 0
Answered
How can i Resample?
hi, You can use the resample function, to get the idea clear here is an example : Fs1= 999.9917; Fs2= 99.9976; t1=0:...
How can i Resample?
hi, You can use the resample function, to get the idea clear here is an example : Fs1= 999.9917; Fs2= 99.9976; t1=0:...
12 years ago | 0
| accepted
Answered
out of memory error while mutiplying large matrices
This multiplication goes beyond the limit of Read-Only-Memory, the solution is to use the multiplication per blocks, see the exa...
out of memory error while mutiplying large matrices
This multiplication goes beyond the limit of Read-Only-Memory, the solution is to use the multiplication per blocks, see the exa...
12 years ago | 0
| accepted
Answered
Image use for further processing in project.
Change the name of the image to X as example, and execute the steps you described, the only operation you need is to separate ch...
Image use for further processing in project.
Change the name of the image to X as example, and execute the steps you described, the only operation you need is to separate ch...
12 years ago | 0
Answered
How to create a continuos surface in 3D
Try to use this method : % X is the 8950*3 matrix x=X(:,1)'*X(:,1); % 8950x8950 y=X(:,2)'*X(:,2); z=X(:,3)'*X(:,3); ...
How to create a continuos surface in 3D
Try to use this method : % X is the 8950*3 matrix x=X(:,1)'*X(:,1); % 8950x8950 y=X(:,2)'*X(:,2); z=X(:,3)'*X(:,3); ...
12 years ago | 0
Answered
Matlab Plotting Error Problem
Graph of one dimensional function is made with vectors X,Y with the same length, add this to your program : Clementi_P...
Matlab Plotting Error Problem
Graph of one dimensional function is made with vectors X,Y with the same length, add this to your program : Clementi_P...
12 years ago | 0
Answered
I'm not sure what is wrong with this code regarding the sin and cos function.
Like Azzi said, pi contains infinite decimal numbers, To avoid this ambiguity i recommend you to use the degree functions instea...
I'm not sure what is wrong with this code regarding the sin and cos function.
Like Azzi said, pi contains infinite decimal numbers, To avoid this ambiguity i recommend you to use the degree functions instea...
12 years ago | 2
| accepted
Answered
What is wrong with this line of script?
Change r0 to : r0=linspace(0.01,0.1,length(r));
What is wrong with this line of script?
Change r0 to : r0=linspace(0.01,0.1,length(r));
12 years ago | 0
| accepted
Answered
What is wrong with this line of script?
The problem resides in the function "cylinder_tank_drain", if it is possible you post the function to study its input and output...
What is wrong with this line of script?
The problem resides in the function "cylinder_tank_drain", if it is possible you post the function to study its input and output...
12 years ago | 0
Submitted
Phase Interferometry : Figure
numeric figure for one dimensional phase interferometry using Uniform Linear array.
12 years ago | 1 download |
Answered
Script that asks for matrix as input
For a single input , what you described is sufficient : >>A=input(' Matrix :\n'); >> % Enter the matrix , example [4 5 6;...
Script that asks for matrix as input
For a single input , what you described is sufficient : >>A=input(' Matrix :\n'); >> % Enter the matrix , example [4 5 6;...
12 years ago | 0
| accepted