Plotting of velocity data points in x-y graph
Have you tried a quiver plot? See the below page for more information: https://uk.mathworks.com/help/matlab/ref/quiver.html

oltre 2 anni ago | 0

| accepted

Printing matrix to display error message, why?
I just copied and pasted your code exactly as it appears above and it runs absolutely fine for me. Can you provide any more det...

oltre 2 anni ago | 0

How can i make plot with different length vector?
My guess here is that your two arrays (A and A1) represent your Y data. In that case you could simply create two different sized...

oltre 2 anni ago | 0

Plotting graph using roots
The roots you have calculated are the x values where y = 0. Therefore to plot these on a graph you can use: p = [1 5.5 3.5 -10]...

oltre 2 anni ago | 1

| accepted

Array indices must be positive integers or logical values.
I just ran this segment of code and I get the same "Array indices must be positive integers or logical values." error but for th...

oltre 2 anni ago | 0

| accepted

BAR graph not working
Is that the exact piece of code you used? On my computer (and Matlab version R2018a) that runs absolutely fine.

oltre 2 anni ago | 0

iterate through elements of matrix
Chuguang Pan answer is correct but is in the comments section rather than the answers section. This won't be able to be accepted...

oltre 2 anni ago | 0

Trying to change colours on the the same plot, but getting error message 'There is no b property on the Line class'
The issue with your plotting command is that matlab is interpreting the 'b',1 part as a pair of commands (i.e. ste the property ...

oltre 2 anni ago | 0

| accepted

Elementwise Matrix multiplication with a Vector to get a higher dimension Matrix
I think this should do the trick. A1 = [1 2 3; 4 5 6; 7 8 9]; Asize = size(A1); V1 = (1:1:3); lengthV1 = length(V1); A2 = z...

oltre 2 anni ago | 1

| accepted

200 pixel to mm
There will definitely be a correlation between number of pixels and size/area, however I don't think you can use it for quantita...

oltre 2 anni ago | 0

Finding a trendline from a scatter plot
MATLAB can do this if you make your scatter plot and then in the figure window go to "Tools -> Basic Fitting". That will then al...

oltre 2 anni ago | 1

| accepted

Problems using parfor due to way variable is used
I think the answer to the below question might be of use to you here. https://uk.mathworks.com/matlabcentral/answers/404809-how...

oltre 2 anni ago | 0

Question

Adjust z-axis location for a pcolor() plot
I am attempting to vertically stack a number of pcolor plots within the same set of axes and then overlay some contour lines ont...

oltre 2 anni ago | 1 answer | 0

### 1

add to a vector by plus 1 and plus 2
I think this should do what you are after X = [1;2;3]; for i=1:3 X(i) = X(i)+i; end Another way would be to do: X = [1;2;3...

oltre 2 anni ago | 0

load .mat files into a loop
You could store the filenames for your arrays into an array (possibly cell array might be better if they aren't all the same num...

oltre 2 anni ago | 1

| accepted

How to plot a matrix with reoccurring values?
Take for example a matrix: vals = [1 1;2 1;2 2; 1 2; 1 3; 2 3; 2 4; 1 4]; which is of the form you describe above. Then do: p...

oltre 2 anni ago | 1

| accepted

Problem finding the index?
The problem is the precision which which your machine is able to store numbers. You are asking MATLAb to find an exact match to ...

oltre 2 anni ago | 0

| accepted

Finding index (x value) of noisy data crossing a threshold value
idx = find(SmoothedData > Threshold); Width = Xdata(max(idx)) - Xdata(min(idx)); Here the first line finds all indices of poin...

oltre 2 anni ago | 0

How to change Marker Color in line graph?
Can you try the below and let us know what happens please? I don't have the necessary toolboxes to check it myself. load('MCA_D...

oltre 2 anni ago | 0

| accepted

How Change Matrix Shape / Setting
Not necessarily a pretty solution but the below will do what you want for the given table. Should give you enough of an idea of ...

oltre 2 anni ago | 1

| accepted

How to rewrite the maximum element of an array by an avarage
So, if I have interpreted your question correctly then you have an array (say A) and you wish to find the maximum valued element...

oltre 2 anni ago | 0

| accepted

Concatenate 8X4 matrix in 16X2 matrix in matlab
This should do it: B = [A(:,1:2); A(:,3:4)]

oltre 2 anni ago | 1

| accepted

HELP NEEDED_ODE45MATLAB
Your problem here is that you haven't passed your parameters into the function. The line: function dY=ODEfun(t,Y,a,b,c,E,h1,N,D...

oltre 2 anni ago | 0

Why don't you draw the line of vectors on the graph?
I think this is because you are plotting inside your while loop. Here you are telling it to plot one data point each time and so...

oltre 2 anni ago | 0

| accepted

How can I use one matrix to assign values to a second matrix using a for loop?
Based on your definition there is nothing to diffuse. If the values is the same all along your domain then there won't be any ch...

oltre 2 anni ago | 1

| accepted

Find zeros of numeric function
You could use fzero for this. Only issue is that it returns the zero closest to a chosen start point, therefore I've put a loop ...

oltre 2 anni ago | 0

| accepted

Plotting a matrix in a for loop.
You have a couple of options here. One is that you store all of the steps of the Markov chain during the for loop and then plot ...

oltre 2 anni ago | 0

| accepted

change scale for colorbar
Have you tried looking at the below link - seems like that might do what you want https://uk.mathworks.com/matlabcentral/answer...

oltre 2 anni ago | 0