Answered
Is there a way to control the length of t in the output of ode45?
Yes. Instead of using a time span, use a time vector. The equation will still be solved the same way (variable time step), but t...

5 years ago | 2

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Answered
how do i use contour command for rectangular plate ?
Include your x and y vectors when plotting. You'll have to do some manipulation of y since you create it starting at 2 and decre...

5 years ago | 0

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Answered
Combine date and time
The best way to combine data types (datetime and numeric) is to use a table. There are several possible approaches. Here is one....

5 years ago | 0

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Answered
How to install toolboxes in cloud mobile MATLAB?
You will have access to whatever toolboxes are on your license. If you do not have a license, you will only be able to use base ...

5 years ago | 0

Answered
discontinuous stairs graph plot
I think the trick here is to realize that MATLAB will treat each column as a separate data series, so orgainze each step (start ...

5 years ago | 0

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Answered
Error in Principal Component Analysis (PCA) matlab
You are getting this error because you have overwritten MATLAB's pca function with your pca.m file. Rename your file, and your c...

5 years ago | 0

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Answered
vertical lines of 'mean' and 'std' in a 'ksdensity' plot?
Use xline. % create a distribution with known mean, std pd = makedist('Normal','mu',2.5,'sigma',3.1); x = random(pd,100,1); ...

5 years ago | 0

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Answered
Custom Add-on setup
If you create a toolbox (*.mltbx), it will appear in the Add-Ons Explorer once installed. If you want users to be able to down...

5 years ago | 0

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Matlab online session not starting .
When you have issues with your session, try deleting it and then sign in again. You can find the instructions here.

5 years ago | 1

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Answered
vectors are not same for ploting
Make moving_avg a 57x429 array, or make fatality_per a 57x429 array. It appears you have more columns of data in dailycases th...

5 years ago | 0

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Answered
How to draw multiple constant lines?
Could you provide more details about what you mean by 'it didn't work'? xline([1,2,3]); xlim([0 5])

5 years ago | 0

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Answered
ODE45: Check for missing argument or incorrect argument | Error in odearguments (line 90) & ode45 (line 115)
If I remove the class structure and just run this as a script, I get a different error. Perhaps investigating this one will fix ...

5 years ago | 0

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Answered
Error using plot Vectors must be the same length.
The error message is telling you what the problem is - you are trying to plot using a different number of x and y points. In thi...

5 years ago | 0

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How Can I plot Streamlines for the following code. You can reduce the time steps to save your time. Thanks!
To use streamlines, you need a grid of x and y vertices, a grid of u and v vector components, and 'seed' x and y values for wher...

5 years ago | 1

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Answered
What does this line of code do?
You have a data type mismatch. You are passing in a variable (Actual) that is categorical, while the function you are using expe...

5 years ago | 0

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Answered
Is there any option to run a polyfit on a scatter plot?
Polyfit is not going to return the X and Y values of those 6 points. It's going to return the polynomial coefficients for the eq...

5 years ago | 0

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Remove Matlab drive from file explorer
Did you install MATLAB Drive Connector? If so, it adds this folder on your computer, which syncs with your MATLAB Drive Online c...

5 years ago | 0

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Answered
Patch won't fill my polygon and inpolygon won't find points inside
For question 2, it doesn't work for a couple reasons. xdim(31:length(zdim)-1) must be the same length as zdim. They are not, so...

5 years ago | 0

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Answered
How can I generate a "histogram", which shows the relative frequencies depending on the angle as "vectors" in polar coordinates?
This sounds like you want to use polarhistogram.

5 years ago | 0

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Answered
I cant solve 13.2 problem in Matlab Onramp
Use the Hint and See Solution links to learn how to complete any of the graded tasks.

5 years ago | 0

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Answered
Index exceeds the number of array elements (1).
It looks like Ch 5 of MATLAB Onramp would be helpful for you. It is unclear to me what you are tryign to do. The issue is you a...

5 years ago | 0

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Answered
Matlab contour plot with color
Use contourf.

5 years ago | 0

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Unrecognized function or variable 'featureInputLayer'.
This function was introduced in R2020b. You can see what release a function was introduced in at the bottom of the documentation...

5 years ago | 0

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Answered
Realize a 3d line plot
You must be getting an error message. What does it say (all the red text)? Check that your inputs are what plot3 expects. plot...

5 years ago | 0

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Answered
MATLAB Online not working
Some things to try: A different browser Clear your cache If it still doesn't work, follow these instructions to reset your se...

5 years ago | 1

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How to automically read data from excel file
I suggest using readtable to import a spreadsheet. See here. As for what to do with the data once you've imported it, I suggest...

5 years ago | 0

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Answered
MATLAB training unstable on Safari 14.1 (macOS 11.3.1)
https://www.mathworks.com/support/requirements/browser-requirements.html

5 years ago | 0

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error: undefinded function
You need to keep in mind what workspace your variables are in. See the Base and Function Workspace page. You define variable a ...

5 years ago | 0

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Need help converting berkeley madonna code to matlab code
Here's equivalent MATLAB code. STARTTIME = 0; STOPTIME = 24; % initial values NF = 0; F = 0; B = 0; L = 0; y0 = [NF; F...

5 years ago | 1

Answered
UITable doesn't work on Standalone Desktop App but on AppDesigner
Consider creating a runtime log of your compiled app. See this answer for more detais. Recompile the app, run it, and click your...

5 years ago | 0

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