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Rik


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1,662 2017 이후 총 참여 횟수

E-mails with feedback/questions about FEX submissions are welcomed. In general I will post e-mails about Answers on the related page, unless there is good cause not to do so.

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how to get an matrix as an output in a function
The mlint is giving you a hint: it wants you to put a semicolon to suppres output. Why would you have an output with the for loo...

약 16시간 전 | 1

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Dividing x tick labels
The XTick property contains a vector with all the positions that should have a tick. The XTickLabel property contains the values...

약 18시간 전 | 0

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class vs data type?
In general I would consider 'class' a superset of 'data type' and only include the core Matlab clases a list of data types, so t...

약 19시간 전 | 0

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Defining scatter plot with different 'markers' & 'colors'
This should be close to what you need: test = xlsread('HQ3.xlsx', 'A2:D223'); x=test(:,1); y=test(:,2); z=test(:,3); groups...

약 19시간 전 | 0

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Creating submatrix with variable indexing
The code below isn't elegant, but it should do what you want. The example is for just 2x2xN. Despite the name, the slow method i...

2일 전 | 0

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Why won't matlab plot data from a table?
You're trying to plot a scalar multiple times, which Matlab happily does for you. You won't see anything, because your line styl...

3일 전 | 0

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Why is this so slow?
Loops with many elements are slow. You also forgot to properly pre-allocate s. N = 10^5; a = 0; b = 4; r = a + (b-a)*rand(N,...

3일 전 | 2

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买了可以用多久
In general you can use the student version for as long as you are a student. Note that officially you can only use the student v...

4일 전 | 0

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campare a row value with the next row
You were close when using diff. You need to think what characterizes all four combinations. The code below should be what you ne...

4일 전 | 1

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Pass variables from callbacks to custom functions in a GUI
I'm going to assume the error occurs at this line guidata(app, handles); You are mixing a GUIDE-style GUI syntax with an AppDe...

4일 전 | 0

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How to Turn Imagesc to x and y?
You can generate the coordinates with ndgrid and then you can linearize the three matrices and use them as input to plot3. ...

4일 전 | 1

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How do I sum the outputs of a for loop?
Create a variable before the loop and set it to 0. Inside the loop you can add the value of Winnings to this variable.

6일 전 | 0

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creating new matrix from remaining of existing 2 matrices
Use ismember with the rows switch to find the rows in A that exist in B, flip this logical vector with ~ and use the result to i...

6일 전 | 0

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Error due to matrix dimensions not being consistent
You have shadowed the internal function mtimes which is used when you use the * operator. Renaming your function should solve th...

7일 전 | 0

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how to assign certain range of pixel values with desired color for classification of image?
What you need to do is replicate your grayscale image to three channels to make it an RGB image. Then you can modify the the col...

8일 전 | 1

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Add a box with error metrics in plot
You can add information to a plot with an annotation, or you can use the rectangle and text functions. The code below will read ...

11일 전 | 0

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Run cmd command from MATLAB
You should not set the PATH, but you should use cd instead to change the directory inside your system call. I personally pre...

12일 전 | 0

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remove zeros from a 15x300 matrix and find the median
You can use this inside your loop. AS_V(i)= median(AS(AS~=0));

13일 전 | 0

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Generate row vectors that match indexes
The code below will sample points over a parabola, since three points fully determine a second order polynomial. The middle poin...

18일 전 | 0

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How can I count the number of times a value occurs
You can use bwlabeln to label all your non-zero regions. then you can loop through each of the labeled regions to determine whic...

18일 전 | 0

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How to set value in a matrix
This was a fun puzzle. I believe the code below is one of the many possible solutions. It does use implicit expansion, so for pr...

19일 전 | 3

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Why the line is not shown in the graph?
You are not indexing the trans variable inside your loop, which results in you overwriting the value every loop iteration. That ...

19일 전 | 0

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how to plot smooth line plot?
The code below generates some example data and then interpolates the data in the loglog domain. %generate some example data X=...

19일 전 | 0

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Need Help about this for loop
You are reusing i as a loop index multiple times. The mlint also warns you about that. It is a good idea to resolve all warnings...

19일 전 | 0

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How to close the figure contain the uifigure after the alert is closed?
The figure you specify does not actually contain the alert. The function only requires an input to determine where the alert box...

19일 전 | 1

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Adjust intervals of x-axis in the plot!
You can directly set the tick locations with the xticks function. Since your variable is already a datetime (and not datenum), y...

20일 전 | 1

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I need to scale the axes of a convolution function after plotting successive convolutions of x with itself. How do I scale the x axis for each so it has the correct support and how do I scale the convolutions to show that they are density functions?
Something like the code below should be close to what you want. Addapt as needed. y=ones(1,20); N=10; output=cell(N,1); ou...

20일 전 | 0

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Vector averaging with mean command
A faster method than a for-loop is using movmean and throwing out the results you don't need. This will also take care of the ca...

21일 전 | 1

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isnetavl
Check for an internet connection by pinging one of Google's DNSes

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Does matlab have any function that can compare multiple numbers and return logical value zero or one?
Another of the many strategies: count the number of elements a unique() call gives you. (when I'm back at a computer I'll test t...

23일 전 | 0

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