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**Content Feed**

Question

Defautl to open *.m files in MATLAB, linux

MATLAB R2020a, Ubuntu 20.04 I am trying to set MATLAB to open m files by default. MATLAB doesn't appear in the "Open with other...

ungefär 3 år ago | 1 answer | 1

### 1

answerArray indices must be positive integers or logical values.

In the line: Pol4(n) = Cd0(0.5*1.225*q(n)*50)^2; what you wrote says to index Cd0 at 0.5*1.225*q(n)*50, which is probably not ...

mer än 3 år ago | 0

vector in a sting input

You need this syntax for string concatenation: B(i) = input( ['Node: ' num2str(i)], 's' ) or B(i) = input( sprintf('Node: %s...

mer än 3 år ago | 1

How can I change an xlsx file to a mat file?

Try using A = readmatrix('spreadsheet.xlsx') to get the data. See the documentation for help on that. Check that the data lo...

mer än 3 år ago | 1

Remove rows with less than certain amount of measurements from timetable

I have some idea about getting the times and unique times T = tab.Time uT = unique(T); and then checking how many times each ...

mer än 3 år ago | 0

| accepted

plotting three functions in the same graph with a specification

Your three function values fall in a range of orders of magnitude spanning 1e3 to 1e10. I think this code is the best visualizat...

mer än 3 år ago | 0

Submitted

fields2struct

fields2struct provides a clean but powerful way to initialize a structure

mer än 3 år ago | 1 download |

Datetime comparison near full hours

Don't bother splitting the time components yourself. t1 = datetime('9-mar-2020 16:00:00'); t0 = datetime('9-mar-2020 15:59:03'...

mer än 3 år ago | 2

| accepted

Extracting data from a signal

Adam, I think the crosshairs in the first image are where the derivative becomes positive: the signal starts to rise. I would us...

mer än 3 år ago | 1

How to add for loop in my code to get a table of result and plot it?

Yes, there are some problems with your for loop. But problems with density of states are fun! Remember, that when you say "for ...

mer än 3 år ago | 0

| accepted

I have to do a single index for the North

Instead of using find, to get the index, just use boolean indexing. This allows you to combine North1 and North2 with a logical ...

mer än 3 år ago | 0

| accepted

How to make an overlaying xy-grid?

Since your grid is symmetric, create a vector describing the mesh points along one dimension.Then use meshgrid grid to make matr...

mer än 3 år ago | 1

| accepted

no output when coding

Do this without a for loop % Load data a = xlsread('outdoorall.xlsx','H2:H52364'); b=xlsread('indoorall.xlsx','H2:H52364'); %...

mer än 3 år ago | 1

| accepted

checking dataType instead typecast at property or argument validation

Hi Florian, I recently learned this property validation as well, and its been working for me. Your syntax is backwards, if you...

mer än 3 år ago | 0

Detection of cracks on scissor's surface using Image processing.

Hafiz, This looks already like a very challenging problem. There is not any kind of built in crack detection code. It would be ...

mer än 3 år ago | 0

How to create a vector?

In MATLAB, create an array by wrapping the data in brackets time_vector = [1 2 3] creates a row vector. Read all about it her...

mer än 3 år ago | 0

Column of matrices for arbitrary N.

Hi Mike. The way you're building phi is creating a matrix, not a vector, since zeros(m,n) creates an mxn matrix. I think this ...

mer än 3 år ago | 1

| accepted

Elegantly refer to the second output from a function

I wrote two or three functions that allow me to do this. I agree, its much nicer to be able to one line certain values from buil...

mer än 3 år ago | 3

Index and remove values in a cell array

Its hard to see what the purpose of this deletion is. It looks like you have multiple (499) datasets described by ixv (some kind...

nästan 4 år ago | 0

Legend doesn't match my plot style

It looks like R1M1V1 is plotting three different curves. This could happen if max_time1 is a vector but R1M1V1 is a Nx3 matrix. ...

nästan 4 år ago | 1

Matlab mapping toolbox and the wmmarker function: how to change “description” from a web page to a file on the computer?

I found the answer! I stumbled across this https://blogs.mathworks.com/community/2007/07/09/printing-hyperlinks-to-the-command-...

nästan 4 år ago | 1

How can I smooth this plot?

A little more crudely than Strider's answer, since you may not have some of those functions in R2017... Here is a function that...

nästan 4 år ago | 0

How to generate and plot multiple semicircle with fixed endpoints but different radius

Thats a neat looking graphic. I don't really understand what its for though. Why don't you just manually draw in the straight li...

nästan 4 år ago | 0

Matlab mapping toolbox and the wmmarker function: how to change “description” from a web page to a file on the computer?

According to the documentation page on wmmarker, "Description elements can be either plain text or HTML markup." HTML links to l...

nästan 4 år ago | 0

| accepted

Can I store and call functions from within a struct?

To further this question, I would like to use fields of the struct as parameters in the functions, hopefully without having to w...

mer än 4 år ago | 0

Question

Dot indexing is not supported for variables of this type

Hello all. I have a very nice piece of GUI code I wrote. Recently, MATLAB crashed while I was writing the code and now when I t...

ungefär 5 år ago | 1 answer | 0

### 1

answermatlab code for eigenvalue problem

Try simplifying the problem you're having instead of dumping equations. I went cross-eyed and I don't know what you want.

nästan 6 år ago | 1

Question

Is the brush tool still supported in R2017b, programatically?

I'm trying to find the best way for a user to interactively select a subset of data in a scatter plot that will then be polyfit ...

nästan 6 år ago | 1 answer | 0