Santhana Raj
Path Partner Technology
https://sites.google.com/site/santhanarajarunachalam/ Professional Interests: Signal Processing, Automotive Radar, Condition Monitoring of rotating equipment.
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FFT of sensor data
You are getting mirror images. except that matlab's FFT results are different from what you have read in your books. Normally FF...
plus de 8 ans il y a | 2
find commun neighbor of matrix
From my understanding of nodes, A =[0 1 0 1; 1 0 0 0; 0 1 0 0; 1 0 1 0;] h=zeros(4); for i=1:4 [~,H]=find(A(i,...
plus de 8 ans il y a | 0
Find the maximum value on each color dimension (red, green, or blue) and plot a circle using that color. There may be more than one pixel with a maximum value; if so, pick one pixel at random.
The property color in plot function takes input between 0 to 1. While your max color values are >1 usually. Try the below one: ...
plus de 8 ans il y a | 0
How to set different y limits for multiple subplots?
Your mistake is to use the function name as a variable. "min" The first loop will work. where you use the min function to get...
plus de 8 ans il y a | 2
How to display the name of my ODE used, as figure title?
The below code works in 2017a: figure('Name','SolverName','NumberTitle','off')
plus de 8 ans il y a | 0
Sum of elements per hour
try this: sum(M(find(M(:,1)=='1-Oct-13' & M(:,2)==1),3)) Repeat this in a for loop, and you can generate N.
plus de 8 ans il y a | 0
What is internal math of the pointsToWorld() function?
PointstoWorld function does the conversion of image points to the real world representation. The real world is some times called...
plus de 8 ans il y a | 0
When I use matlab neural network toolbox, what is the cost function of the training?
The default cost function is Cross Entropy, if am not wrong. You can check doc patternnet to get more details
plus de 8 ans il y a | 0
Data not being filtered out by threshold
If you see the help of diff, it says: diff(X), for a vector X, is [X(2)-X(1) X(3)-X(2) ... X(n)-X(n-1)]. So, in your case, ...
plus de 8 ans il y a | 0
Is there a way to plot a confusion matrix of the cross validation results?
I am not aware of any method to plot confusion matrix. But usually I calculate the precision and recall from the true positives...
plus de 8 ans il y a | 0
How create string like this: word+number+word with number=num2str(x)
x=2; y= ['I have' num2str(x) 'dogs'];
plus de 8 ans il y a | 3
| A accepté
2d plot of a function with two variables
No.You need not. generate vectors of x and t. Then implement the function for y. Use mesh to plot result. Remember to use the...
plus de 8 ans il y a | 0
how to calculate the classification accuracy in neural network toolbox?
There are various parameters that can and are used in different classification algorithms. Take a look at this wiki page: <ht...
plus de 8 ans il y a | 0
Error using xlsread (line 260)
<https://in.mathworks.com/matlabcentral/answers/305976-error-using-xlsread-line-249-excel-worksheet-could-not-be-activated>
plus de 8 ans il y a | 1
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Problem subtracting and adding a value to a textbox using a popupmenu and push buttons
The GUI workspace handles variables differently than a normal function. The function subtract_callback has its own workspace and...
plus de 8 ans il y a | 0
GUI with guide, statements around the functions
U can use statements 'around' callback functions. You have to be more clear on this. Since you are new to GUIDE, I would advi...
plus de 8 ans il y a | 0
Loading in png file that is black
By saying that the image appears in black, do you mean that the image is still visible but the image is in grey scale?? The belo...
plus de 8 ans il y a | 1
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Loading in png file that is black
The problem might be due to improper scaling or the type of image. Use imagesc
plus de 8 ans il y a | 0
why we need scale in implementations of FFT?
This is because the FFT equation implmented by Matlab is little different from your textbook equation. Usually in a engineeri...
plus de 8 ans il y a | 1
I want to solve this equation and plot it but lot of errors are coming kindly help
Matrices multiplication can be element by element or vector multiplication. For element by element, which I assume you want, th...
plus de 8 ans il y a | 0
How can I create the matrix in the photo?
Try making BNdog=[4 7]; instead of [4 4]
plus de 8 ans il y a | 0
Help with a for-loop of an array of iterative matrices
Consider one set of your code: col1 = rep1(:,1)'; col2 = rep1(:,2)'; col3 = rep1(:,3)'; col4 = rep1(:,4)'; col5...
plus de 8 ans il y a | 0
how to do curve smoothing in real time?
Try applying a moving average filter or otherwise called a box filter.
plus de 8 ans il y a | 0
numbers in random positions on a zero matrix
Start with the function randi(4). it generates random integers. It doesnt give 0, so you can generate with a max of 4 and subtra...
plus de 8 ans il y a | 0
Time shifting property DTFT
I suppose this is what you want to do: clc, clear all, close all; x=rand(1,21);n=0:20; k=0:20;w=(pi/20)*k; X=x...
plus de 8 ans il y a | 0
matlab 2017a takes 10 minutes+ to initialise
I had a similar problem. The reason in my case was because Matlab, due to some unknown reason, was taking too much time to locat...
plus de 8 ans il y a | 0
Importing / Xlsread: How to replace unknown character?
Instead of using xlsread, use readtable. one of its options is fileEncoding. I am sure it can read Swedish, but you can explo...
plus de 8 ans il y a | 0
How to design a position control in C using Matlab
For PID equation, you have to find the previous error values also. Foe example, for integral action, sum of all previous errors...
plus de 8 ans il y a | 0
Performance comparison plotting for different Back propagation algorithms
You have to calculate the mean square error and time taken. You can use (t-y) to calculate the error and tic/toc to calculate th...
plus de 8 ans il y a | 0
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