Question

what is the meaning of @ in matlab code?

Hi all, i just downloaded a matlab function from some website and saw something strange if ~isa(A, 'function_handle') AT =...

1 month ago | 0 answers | 0

Question

What is the meaning of thresholding a wavelet?

Hi all What is the meaning of this threshold? see link below: Wavelet compression what is the limit of this threshold? why...

1 month ago | 0 answers | 0

Question

How to compress wavelet transform

when i preform a FFT2 (of an image) it is simple to compress it by ignoring the edges and then to reconstruct using ifft. but h...

1 month ago | 0 answers | 0

Question

Trying to use Wiener filter to remove blurr and noise, get a matrix of NaN, why?

Hi, i'm trying to remove blurr and noise from an image using wiener filter and can't do this, i get the reconstruction as a NaN ...

2 months ago | 1 answer | 0

Question

Unable to save variables and figures of large arrays

i keep getting this error: Warning: Variable 'hgS_070000' cannot be saved to a MAT-file whose version is older than 7.3. To sa...

6 months ago | 1 answer | 0

Question

what is the code for the default blue color for 2D plot?

while ploting something i noticed that the default color is more like light blue, but when i define the color blue i get a diffe...

8 months ago | 2 answers | 0

Question

how to mark 2D plot with shapes for long array?

trying to mark 2D plots with shapes using the following command: h=semilogy(lambda,Hb); set(h,'linestyle','-','color','b...

8 months ago | 1 answer | 0

Question

how to customize 2D plot lines with shapes?

Hello, i'm writing a document that will be printed with only black printer cratrage, my plots are consisted of several lines ea...

8 months ago | 2 answers | 0

Question

trying to make fourier transform of 3 pulses but the sampling is bad, how to fix it?

when i try to make fourier transform of 3 pulses the resault doesn't look so good but when i make fourier transform of only one ...

2 years ago | 1 answer | 0

Question

how to make these vector with polar coordinate r into a matrix with coordinate phi?

Hello, i have a simple vector in coordinate r (polar) without the coordinate phi (polar), i would like to make this a matrix tha...

2 years ago | 0 answers | 0

Question

why this fourrier transform is not good?

this script should calculate the fourier transform of a single sine with frequency of 1KHz and for some reason i can't see the p...

3 years ago | 1 answer | 0

Question

how to make inverse fourrier transform in the correct way?

as you can see in my code, i made a fft of a simple signal but when i try to reconstruct it using ifft i can only see it in the ...

3 years ago | 1 answer | 0

Question

MATLAB GUI how to make an action after clicking axes?

i want to click on axes and to copy the axes into the clipboard using this: print -dmeta -noui how to do this?

4 years ago | 0 answers | 0

Question

how to change static text in MATLAB GUI?

how to change static text in MATLAB GUI?

4 years ago | 2 answers | 0

Question

problem with numerical derivative using gradient function

while using gradient i encounter a phenomenon that i cannot explain, as you can see from the example below a=[1 2 7 9; ...

4 years ago | 1 answer | 0

Question

using diff or gradient function normalized the vector

for some reason when i use gradient function over a vector the scale get lowerd for example of sin function: the maximum is di...

4 years ago | 1 answer | 0

Question

problem savind with diary function

something wierd, only the second time that i run the script the function actually save the data in the txt file. what am i doin...

4 years ago | 1 answer | 0

Question

how can i use function of plots that i made inside subplot?

i made this function that create a polar plot how can i use this in subplot, i tried this but it didn't work, it makes a mess.

4 years ago | 1 answer | 0

Question

can't change encoding of text file

while using the function fopen and textscan for text file i get this warning: *Warning: The encoding 'windows-1255' is not su...

4 years ago | 1 answer | 0

Answered

matlab won't start on windows 7

must be something wrong on windows update, microsoft relesed an update today and everything is back to normal.

matlab won't start on windows 7

must be something wrong on windows update, microsoft relesed an update today and everything is back to normal.

4 years ago | 0

| accepted

Question

warning of encoding is shown when trying to read text file

while using the function fopen and textscan for text file i get this warning: *Warning: The encoding 'windows-1255' is not su...

4 years ago | 0 answers | 0

Question

matlab won't start on windows 7

don't know what happend when i click on matlab the splash screen turned on and then closed matlab work without java mode but...

4 years ago | 2 answers | 0

Question

trying to read text file with matlab

for a file such as this: http://iopscience.iop.org/0266-5611/17/6/301/media/dielTM_dec4f.exp i created this function: <http...

4 years ago | 0 answers | 0

Question

how to scan text

on those files: http://iopscience.iop.org/0266-5611/17/6/301/media/rectTE_8f.exp http://iopscience.iop.org/0266-5611/17/6/...

4 years ago | 3 answers | 0

Question

something wierd with sinc function

while using sinc(x) function there is a difference between sinc(x) and sin(x)/x also when i manually calculate its equal to ...

4 years ago | 1 answer | 1

Question

how to make fft2 surf plot with z axis in dB?

i tried to normalize this matrix with the maximum and: p=10*log10(p); but i get mess how can i avoid that?

4 years ago | 3 answers | 0

Answered

how to make fft2 surf plot with z axis in dB?

here is my data file: <https://dl.dropboxusercontent.com/u/38094905/pmat.mat> you can load it like this: data=load('pm...

how to make fft2 surf plot with z axis in dB?

here is my data file: <https://dl.dropboxusercontent.com/u/38094905/pmat.mat> you can load it like this: data=load('pm...

4 years ago | 0

Question

looking for a better way to detect peaks

when using find peaks i get all the litlle peaks under 0.3 is there a way to detect only the 5 peaks? (without manually setting...

4 years ago | 1 answer | 0

Question

how to find the middle of rectangular pulse?

the middle in x axis in this plot: <</matlabcentral/answers/uploaded_files/20425/untitled.jpg>>

4 years ago | 0 answers | 0

Question

how to use randperm with a seed?

while using randperm function i need matlab to remember the previous values and not to repeat them in the next run (inside a loo...

4 years ago | 1 answer | 0