You cannot have non-integer sized matrices. 22,5 is not a valid dimension of a matrix. If you are talking about images you can resize the matrix in Matlab using imresize. . A = rand(254, 128); A = imresize(A, [45, 23]); 5 solved Matrix Scale down using MATLAB [closed]
Probably the “mesh” is the one that will do for you. See the documentation for this for more, but you can try: x=linspace(….);y=… [x,y]=meshgrid(x,y); z= x^2 – 4*x + y^2 – y – x.*y mesh(x,y,z) solved What can I use MATLAB function “Plot3D”? [closed]
well you can call C# code from matlab so you can use this same method in matlab check this link out for more details : Call .NET libraries from Matlab The other way around is for you to learn matlab , it may be worth it 0 solved How can I convert C sharp code … Read more
For starters, try detecting faces using vision.CascadeObjectDetector in the Computer Vision System Toolbox. If you have to roll your own, then take a look at this example, showing how to train a classifier to recognize digits using HOG features and SVM. Note, that the classifier is only one part of the process. You would need … Read more
Try this. folder=”C:/foobar/”; files = dir([folder ‘*.mat’); for i = 1:numel(files) load(files(i).name; end 1 solved How I read mat format files from folder in matlab? [closed]
To change direction of y axis, including axis labels and plotted values, you use set(gca,’YDir’,’reverse’) When you plot an image, for example using imagesc, the YDir property is automatically set to reverse. So, to change it, set it to normal: set(gca,’YDir’,’normal’) 2 solved To reverse the values from up to down and change y-axis too … Read more
The watt to dBm conversion follows the following rule: dBW = 10 * log10(P[w]) dBm = 10 * log10(1000 * P[w]) = 10 * log10(P[w]) + 10 * log10(1000) = 10 * log10(P[w]) + 10 * 3 = 10 * log10(P[w]) + 30 = dBW + 30 Hence, the inverse path will be: P[w] = … Read more
y = rand(20,3); Creates a matrix of uniformly distributed random numbers, y. aa= unidrnd(2,20,3) – 1; Creates a matrix of uniformly distributed random integers, that goes from 1 to 2, and then subtract one. Thus, aa is a matrix of 0s and 1s. val = ( aa & y<1.366e-04) | (~aa & y<8.298e-04); This line … Read more
Your problem is a very specific one. I don’t see how this will be of any use to anybody but yourself. There is no ‘one line solution’. There are many ways to approach indexing problems, I like to use scalar indexing when possible: Ncolumns = size(Matrix,1); Nblocks = floor(Ncolumns/4); %number of 4-line blocks (excluding the … Read more
You don’t need .select(). You just need to cast an array of bool to an array of H‘s component type. H = ((K * W).array() > 0.0).cast<double>(); Your original attempt failed because the size of your constant 1/0 array is not match with the size of H. Using VectorXd::Constant is not a good choice when … Read more
I will write just the skeleton of the code, the rest of the statements must be completed by you. I will use ii and jj instead of i and j because these have special meaning in MATLAB (complex square root of -1). for ii = 1:101 % statements end; jj = 6; while true for … Read more
To get started with, FASTA is text file format. To write text files check MATLAB documentation of fopen, fprintf and fclose. To load the text from the data files you’ve written you can use fopen, fscanf and fclose. Actually, MATLAB has fastainfo, fastaread and fastawrite too. You should check MATLAB documentation of these commands and … Read more
If you wanted to be real fancy, you could write an anonymous function to do this since you can then use inputname to infer the name of the input variable. func = @(var)fprintf(‘\n%s size: %s\n’, inputname(1), num2str(size(var))) x = rand(10, 4); func(x) % x size: 10 4 You can also just use fprintf fprintf(‘\n%s size: … Read more
The question is a bit complicated and hard to follow.. Anyways I tried writing some code to the best of my understanding of the problem. Here is the part that finds the possible combinations: % input matrix A=[1 2 0 1 2 0 0 0 2 1 1 1 0 2 2 0 3 0 … Read more
With your example equation, Rody’s answer provides an analytic solution. In general, however, given an equation f(x,y)=0 it may not be possible to find an analytic solution. In that case I suggest: Define a target x, y area and generate random samples within it. Compute z = abs(f(x,y)) at the sample points. Sort the values … Read more