How to plot a quadratic equation?
Hello, If you have a newer release of Matlab (I believe R2016b), you can use the new <https://www.mathworks.com/help/matlab/r...

mehr als 5 Jahre ago | 4

| accepted

Find the euclidean distance between elements of two matrices, one element of first one from all elements of the second one.
Hello, You could do this using the distance formula, or the built in <https://www.mathworks.com/help/stats/pdist2.html pdist2...

mehr als 5 Jahre ago | 2

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how to add multiple y-axis point on my plot?
Hello, To have two different y-axis (on left and right sides), you can use one of two functions depending on which MATLAB rel...

mehr als 5 Jahre ago | 0

change equal values in a column to nan
Hello, Try this: % Given matrix A for i = 1:size(A,2) % go through each column for j = 2:size(A,1) % through el...

mehr als 5 Jahre ago | 1

| accepted

Submitted

Pacman (with a twist)!
This is a play off Pacman - type help Macpan to see details.

Question

How to Edit File Information in MATLAB File Exchange?
Hello, After briefly searching for a method, I was unable to find a way to edit the file information that goes along with a f...

mehr als 5 Jahre ago | 2 answers | 0

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Hi Guys I need help. I need to get user input of a postfix expression and then evaluate the expression. But, I am having trouble in storing the postfix expression in a variable and then to read it by one character at a time.
Hello, If I was to solve this problem and I had, a = '123*+'; I would parse the data as follows (perhaps think of a b...

mehr als 5 Jahre ago | 1

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How do I find only the small peaks in the signal?
Hello, I would recommend using simple high and low pass filters to acquire the smaller peaks. In other words, filter out d...

mehr als 5 Jahre ago | 1

Error when using ode45 command,"returns a vector of length 11, but the length of initial conditions vector is 1."
Hello, The way the ode45 command works (as I'm sure you know) is that given a state vector, in your case w, you provide a fun...

mehr als 5 Jahre ago | 1

| accepted

How to rotate points on 2D coordinate systems
Hello, You can rotate your points with a <https://en.wikipedia.org/wiki/Rotation_matrix rotation matrix>: Here's a simple ...

mehr als 5 Jahre ago | 9

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How to insert NaN at the end of matrix (.mat)
Hello, Would it be sufficient to: load('your_file.mat') Matrix_Name = [Matrix_Name; NaN NaN]; % Get rid of extra...

mehr als 5 Jahre ago | 0

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How can I plot the square root of normally distributed data?
Hello, The problem is that transforming data with a square root does not necessarily maintain the normal distribution, this i...

mehr als 5 Jahre ago | 2

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Trouble with a correlation analysis code
Hello, I downloaded your data and ran your code and it didn't encounter any errors for me (rows was a logical vector so rows=...

mehr als 5 Jahre ago | 0

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Multiple line and bar with two y axis.
Hello, Stealing entirely from Jan Simon's comment, you can use the <https://www.mathworks.com/help/matlab/ref/yyaxis.html#mor...

mehr als 5 Jahre ago | 0

How to plot the equation |x|+|y|+|z|=1 ?
Hello, I'm certain there's a better way to do this, such as with surf, but here is a solution. If you consider the equatio...

mehr als 5 Jahre ago | 0

Matrix manipulation and using the sum command
Hello, Would, A(2,2) = 0; A(2,2) = sum(A(:)); or A(2,2) = sum(A(:)) - A(2,2); suffice? You could also gen...

mehr als 5 Jahre ago | 1

Replacing values in a cell with NaN
Hello, Your code works for me, although I would recommend using for i = 1:size(Data,1) rather than for i = 1:len...

mehr als 5 Jahre ago | 1

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how to divide an image into 16x16 non overlapping blocks
Hello, Assuming your image has size m x n where m and n are multiples of 16: YourImage = im2double(YourImage); [m,n] ...

mehr als 5 Jahre ago | 2

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I have I and Q data in time but I need to plot them in frequency
Hello, Your solution lies within your tags. The Fourier transform is a way to change a signal from its original domain to a r...

mehr als 5 Jahre ago | 0

Given standard deviation of two of the variables in a function, calculate the standard deviation of the output
Hello, Assuming x and y have the same mean (among other things), I'd say about 14.61%. I simulated it as follows: for i ...

mehr als 5 Jahre ago | 1

Is it possible to apply common axes values to existing figures?
Hello, You can use: axis([x1 x2 y1 y2]) where x1 specifies the left side axis limit of the x-axis, x2 the right side ...

mehr als 5 Jahre ago | 0

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why do get an error when I use the help function?
Hello, It seems that you have a script/function named help.m in the directory. You should rename this to something unique,...

mehr als 5 Jahre ago | 1

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How to Read a file with unknown name
Hello, You can do so like this (assuming only one csv file): A = dir('*.csv'); B = csvread(A.name); Hope this he...

mehr als 5 Jahre ago | 1

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how to add 3 matrices with one dimension same for all and other dimension different?
Hello, I only tested this with your example and it worked, but I think it's generally correct: % % Strangely adding mat...

mehr als 5 Jahre ago | 1

How to orient a text arrow
Hello, You can specify the start and end of the arrow, as well as the type of arrow using an <https://www.mathworks.com/help/...

mehr als 5 Jahre ago | 0

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Shade a wedge/portion of a compass or polar plot?
Hello, I've found <https://www.mathworks.com/help/matlab/ref/fill.html fill> to be useful in this scenario, although it's slo...

mehr als 5 Jahre ago | 1

How do you pass a matrix (parameter) to decic and ode15i?
Hello, Rather than having to include your matrix in the decic/ode15i functions as an input, you could declare your matrix as ...

mehr als 5 Jahre ago | 0

| accepted

Question

Are Global Variables Transferred Significantly Slower Than Function Inputs?
Hello, I have a few massive matrices which are used in a function that is called many thousands of times. Due to the way the ...

mehr als 5 Jahre ago | 1 answer | 0