# Questions for matlab

7024

### setting up matlab multicore computing

I'm trying to use something like this in matlab335

### Is normalization useful/necessary in optimization?

I am trying to optimize a device design using Matlab optimization toolbox (using the fmincon function to be precise). To get my point across quickly I am providing a small variable set {l_m, r_m, l...9905

### How do I rasterize an image in Matlab?

I need to rasterize an image in matlab.6743

### Input data to Simulink from workspace

Hello anyone does know? I have data(myData) from matlab workspace. And in matlab simulink I have to do control system with regulator.First how to put data(myData) to simulink model input,and I want...9645

### How to plot a surface with a texture map

I want to plot a surface with a texture map on it, but the conditions are not the "ideal" ones.4589

### Random angle in matlab

I'm trying to write a matlab program which is able to a random walk, but each step/vector has the same length and the thing that determines the direction is a "random" angle. The angle is not quite7767

### Is there an accumarray() that takes matrix as `val`?

accumarray()'s val argument must be a vector. In my case I need columns of a matrix to be summed (or averaged). Is there a function or a method to achieve this?509

### MATLAB Builder JA dependency

I try to run MATLAB code in Java with MATLAB Builder JA to get the JAR file. test.m works fine, but not the test2.m that depends on test.m.5336

### How to create a dataset in matlab with random values except for a specific area?

I have attached a sample image with explains the requirement.8922

### Discrepancy between Matlab del2 and Matlab gradient of gradient

can anyone explain why I get such dramatically different results for the Laplace operator in Matlab when I use2680

### Finding all edges (and nodes) within X steps from a chosen line in an adjacency matrix in MATLAB

I have a nx2 matrix of to-from nodes for a large network structure. I have used this to create a sparse adjacency matrix which I can plot using BIOGRAPH. My systems varies in size, the largest ones4349

### Reduce the number of rows in a random matrix created with randn

I have a matrix like4376

### Zero padding/stuffing in matlab

Basicly I have array like this:9267

### Power spectral density of a signal with gaps?

Does anyone know if it is possible to find a power spectral density of a signal with gaps in it. For example (in matlab syntax cause that is what I'm familiar with)334

### Insert ASCII in LSB

Does anyone know a efficient method in order to insert the ASCII value of some characters in the 8 least significant bits (LSB) of a 16 bit number?5131

### find number of '*.xls' files in matlab

I have the following code:5759

### In MATLAB, how to generate random numbers depending on the data?

For example if Ax = 0.0023, it should add some noise to it and produce newAx = 0.0027814

### matlab Is there something like list comprehension as it is in python?

I am looking for something like list comprehensions in matlab however I couldnt find anything like this in the documentary.1057

### logical values for censored data matlab

I am relatively new to Matlab and have a question about creating a logical array in Matlab6810

### Matlab - How to read values from a text file?

I am aware that my question may seem similar to others having already been posted. However, I have browsed through answers to apparently close questions, but still couldn't do what I want. Hence, I...363

### MATLAB “C” DLL Errors

I'm compiling some MATLAB functions into a C DLL. The exported mlf functions return a boolean value representing whether the function succeeded or not. When the return value is false, I want to fin...9157

### A system or language to reverse equations?

Lets say I have a simple equation as follows:7529

### Get the file name without Extension in matlab

I want to get the image file name without the Extension in MATLAB.9817

### Matlab-While loops

Given an array I have to print numbers in the array which must be positive and divisible by 2, if the condition does not hold print "didn't find" only once.7074

### Combination of stacked and normal bar graph in matlab

I want to plot a bar graph in Matlab, where some of the items are normal and some are stacked. How can I achieve that.897

### eval alternative in Matlab reading from the workspace

I'm reading a matrix from a .mat file. What is an alternative for eval in this case?2930

### fminsearch on a function internally using matrices

I'm having trouble minimizing a rather complicated function:8680

### Machine learning: Supervised learning to learn & predict next RSA code

I was going through Andrew NG's machine learning course. I am still at the beginning stages.9475

### how to control return variable in matlab

i want to clarify how to control returning of variables from function in matlab,for exmaple let us consider this code6359

### How do I create a matlab 201X 201 matrix

How do I create a 201x 201 matrix with all odd rows alternating as 3,1,3 and the even rows alternating as 1,2,1,2. I tried using a random number generator, a for loop, and am thinking about using the2742

### Intersect X and Y axes at origin (0,0) using scatter in Matlab

I have 2 matrices:8351

### Matlab: Put each line of a text file in a separate array

I have a file like the following4599

### regarding saving the numerical and string values altogether

I have a string matrix with N rows and 2 columns. Each cell stores a string. I have another N*1 vector, where each entry is a numerical value.4150

### Problems with network input size

I've been working on a character recognition program in MATLAB for sometime now and asked a couple questions on stackoverflow and received good feedback. So I figured I would try my luck again.4576

### Is there an easy way to provide a Matlab-based Web App or Web Service?

A colleague and I have spent a few years developing a really cool Matlab application, MDLcompress. Within Matlab, I can type "MDLcompress('filename.txt')" and it will tell me all sorts of really c...8593

### How do I compare the function choleskiSol?

How do I deduce replacement algorithms forwards and backwards in the solution phase of the Cholesky method?7552

### suppress findpeaks warnings in MATLAB Signal Processing Toolbox

I use the function findpeaks from MATLAB's Signal Processing Toolbox. But everytime the function does not find any peaks I receive the warning:448

### matlab openfig call from java

I'm using WebFigures in Matlab, and I have a simple function in matlab8807

### excel into matlab

I have several excel spreadsheets in a folder, where each spreadsheet contains several worksheets. I've written a code which loads a specific worksheet from each spreadsheet into matlab. The worksh...5605

### How to shuffle (completely at random) big data stored in Excel file by Matlab?

I want to shuffle my data row wise (in a single unique row there will be no shuffling, it has to remain the same - I mean all individual cells in a single row can not change). The number of rows I ...3288

### Matlab: using third-party java classes from within spmd

I'm trying to use a class from a third-party Java library from within spmd, but I keep getting various errors related to importing it.1206

### adjusting amplitude modulation / wave shaping

I have some working code that does amplitude modulation and plots it.934

### How to eliminate a prefix string with all 0s

There have a set of strings, some of them are prefixed with 0, and others are not. For instance,8511

### Matlab openfig from URL or java input stream

I'm using WebFigures in Matlab and calling the getFig function from Java5812

### Matlab — how to convert this code so that it can run using parfor?

I have the following code in Matlab (simplified, of course, but this shows the root of the problem), which used for previously; I want to change it to use parfor instead:2942

### how to generate random numbers with lognormal distribution and with specified geometric mean and geometric standard deviationin Matlab

I would like to generate some random numbers log-normally distributed with a specified geometric mean (GM) and geometric standard deviation (GSD), say GM=10 and GSD=2.5.9993

### Find the m-th smallest number in Matlab?

Is there an efficient way to find the m-th smallest number in a vector of length n in Matlab? Do I have to use sort() function? Thanks and regards!5782

### In MATLAB, why can't I compose transpose and colon operators?

In MATLAB I can easily get a vector of the elements of a matrix in column major order using the (:) operator as follows...3081

### Convert binary string greater than 52 bits to single in Matlab?

I'm trying to convert very long binary strings, often greater than 52 bits into numbers. I cannot have a fixed lookahead window because I am doing this to calculate a version of Lempel-Ziv complexi...8843

### Parsing text file in matlab

I have this txt file:2417