Answered

turn plot into a polyfit or polyval

In your figure window, select Tools > Basic Fitting Use the UI to find an appropriate fit to your data. Once done, export the r...

turn plot into a polyfit or polyval

In your figure window, select Tools > Basic Fitting Use the UI to find an appropriate fit to your data. Once done, export the r...

20 days ago | 0

Answered

Create 3D geometry by revolve (e.g. a cone) for use in the partial differential equation toolbox

Perhaps not the answer you are looking for, but I've found it easiest to create my geometries in other tools, and then import an...

Create 3D geometry by revolve (e.g. a cone) for use in the partial differential equation toolbox

Perhaps not the answer you are looking for, but I've found it easiest to create my geometries in other tools, and then import an...

20 days ago | 0

| accepted

Answered

Problem Using ode45 Function

The error I see is that you have not defined the inputs to your ode function in the correct order. Namely, t must be the first i...

Problem Using ode45 Function

The error I see is that you have not defined the inputs to your ode function in the correct order. Namely, t must be the first i...

20 days ago | 0

Answered

How to save data to existing excel file

Try using readtable and writetable.

How to save data to existing excel file

Try using readtable and writetable.

20 days ago | 0

Answered

Generate 3D plots using 3D variables (Lat,lon,depth,Salinity)

surfc and contour3 do not accept 3D variables as inputs. See here: https://www.mathworks.com/help/matlab/ref/surfc.html#mw_bf4...

Generate 3D plots using 3D variables (Lat,lon,depth,Salinity)

surfc and contour3 do not accept 3D variables as inputs. See here: https://www.mathworks.com/help/matlab/ref/surfc.html#mw_bf4...

20 days ago | 1

| accepted

Answered

How to create different Plots for different functions while each function has been plotted using hold on

Perhaps what you need is to create a plot with two y axes, one for entropy and the other for enthalpy? If so, use yyaxis. x = l...

How to create different Plots for different functions while each function has been plotted using hold on

Perhaps what you need is to create a plot with two y axes, one for entropy and the other for enthalpy? If so, use yyaxis. x = l...

21 days ago | 1

Answered

Finding daily min and max values for time series data

Use groupsummary and group the data by 'day' and the method set to max and min. See this answer: https://www.mathworks.com/matl...

Finding daily min and max values for time series data

Use groupsummary and group the data by 'day' and the method set to max and min. See this answer: https://www.mathworks.com/matl...

21 days ago | 0

| accepted

Answered

Facing difficulty in finding the error saying Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters."

You are trying to index a function input variable in the function declaration. This is not allowed. Instead, create a new variab...

Facing difficulty in finding the error saying Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters."

You are trying to index a function input variable in the function declaration. This is not allowed. Instead, create a new variab...

21 days ago | 0

Answered

Reconstructed Pulse Out of Phase

I'm not an FFT expert, but it appears to be related to your value of n. At least the shift goes away when I use L instead (seeth...

Reconstructed Pulse Out of Phase

I'm not an FFT expert, but it appears to be related to your value of n. At least the shift goes away when I use L instead (seeth...

21 days ago | 1

Answered

problem with colorbar in using scatter3

First, the error is not related to colorbar. It is an error occurring with scatter3, specifically the format of your ColorVariab...

problem with colorbar in using scatter3

First, the error is not related to colorbar. It is an error occurring with scatter3, specifically the format of your ColorVariab...

21 days ago | 0

| accepted

Answered

I can't unistall MATLAB R2021b

See this answer https://www.mathworks.com/matlabcentral/answers/92244-how-do-i-uninstall-matlab-on-windows-when-the-uninstaller...

I can't unistall MATLAB R2021b

See this answer https://www.mathworks.com/matlabcentral/answers/92244-how-do-i-uninstall-matlab-on-windows-when-the-uninstaller...

25 days ago | 1

| accepted

Answered

Stateflow Onramp section 4.3 chart symbols correctly defined failure

I think you should only have 1 buttonPressed item in your Symbols panel.

Stateflow Onramp section 4.3 chart symbols correctly defined failure

I think you should only have 1 buttonPressed item in your Symbols panel.

26 days ago | 0

Answered

transparent grey bar on graphs

Use patch, and plot the line after the patch. x=0:.1:5; y=(x-2).^3; patch([0 5 5 0],[0 0 4 4],[.75 .75 .75]) hold on plot(y...

transparent grey bar on graphs

Use patch, and plot the line after the patch. x=0:.1:5; y=(x-2).^3; patch([0 5 5 0],[0 0 4 4],[.75 .75 .75]) hold on plot(y...

26 days ago | 0

| accepted

Answered

Fix the error with "Error using urlread'

Assuming you are trying to run the example_nlc demo files that come with APM, I was unable to duplicate your error. Is your path...

Fix the error with "Error using urlread'

Assuming you are trying to run the example_nlc demo files that come with APM, I was unable to duplicate your error. Is your path...

26 days ago | 0

Answered

How can i create a loop to generate daily averages from a csv. file for over four years and whose data was input at a 15minutes interval?

Use groupsummary and group the data by 'monthofyear' and 'dayofmonth' and the method set to mean. See this answer: https://www....

How can i create a loop to generate daily averages from a csv. file for over four years and whose data was input at a 15minutes interval?

Use groupsummary and group the data by 'monthofyear' and 'dayofmonth' and the method set to mean. See this answer: https://www....

26 days ago | 0

| accepted

Answered

How to index the matrix only the first dimension of the rest

It depends what you want the ouput dimensions to be. If you just want them in a vector, then you can just use a single colon. A...

How to index the matrix only the first dimension of the rest

It depends what you want the ouput dimensions to be. If you just want them in a vector, then you can just use a single colon. A...

27 days ago | 0

Answered

I would like to learn how to code

Your title is 'I would like to learn how to code'. To answer that question, I would direct you to MATLAB Onramp. Once completed...

I would like to learn how to code

Your title is 'I would like to learn how to code'. To answer that question, I would direct you to MATLAB Onramp. Once completed...

27 days ago | 0

Answered

Convert signals of a mf4 file to double variables

Perhaps this example is helpful? https://www.mathworks.com/help/vnt/ug/reading-data-from-mdf-files.html

Convert signals of a mf4 file to double variables

Perhaps this example is helpful? https://www.mathworks.com/help/vnt/ug/reading-data-from-mdf-files.html

27 days ago | 0

Answered

How can I find the peak values of a curve?

If you are using a live script, I suggest using the Find Local Extrema task. You can see an introduction to this tool in this re...

How can I find the peak values of a curve?

If you are using a live script, I suggest using the Find Local Extrema task. You can see an introduction to this tool in this re...

27 days ago | 1

Answered

Using interp1 with semilog dataset

You do not need to take account of the fact that you are plotting your data in a semilog plot. That doesn't impact how you would...

Using interp1 with semilog dataset

You do not need to take account of the fact that you are plotting your data in a semilog plot. That doesn't impact how you would...

27 days ago | 1

| accepted

Answered

Unable to perform assignment because the left and right sides have a different number of elements, error

The output of EvaluateIndividual(a,b,functionData) is a 101x2 array. You are trying to assign this to a single element of fitnes...

Unable to perform assignment because the left and right sides have a different number of elements, error

The output of EvaluateIndividual(a,b,functionData) is a 101x2 array. You are trying to assign this to a single element of fitnes...

28 days ago | 0

Answered

Colour points in 2d or 3d based on value of another vector

With the scatter function, you can specify the color as a vector of numbers. See this example x = linspace(0,3*pi,200); y = co...

Colour points in 2d or 3d based on value of another vector

With the scatter function, you can specify the color as a vector of numbers. See this example x = linspace(0,3*pi,200); y = co...

28 days ago | 0

| accepted

Answered

Index in position 1 exceeds array bounds. Index must not exceed 1200. i am getting this error.

Position 1 is your row index. Apparently, data only has 1200 rows, and your code is trying to extract row 1201. % simple exampl...

Index in position 1 exceeds array bounds. Index must not exceed 1200. i am getting this error.

Position 1 is your row index. Apparently, data only has 1200 rows, and your code is trying to extract row 1201. % simple exampl...

29 days ago | 0

Answered

Why are the colours in the legend different?

Legend is consistent with your code. Why do you think it is wrong? Here's an attempt at recreating your plot. Note that I elect...

Why are the colours in the legend different?

Legend is consistent with your code. Why do you think it is wrong? Here's an attempt at recreating your plot. Note that I elect...

1 month ago | 0

Answered

Plotting using the Bar Function

The error you are getting from Grader is that the values of y1 are incorrect (if you were using the wrong variable name, the err...

Plotting using the Bar Function

The error you are getting from Grader is that the values of y1 are incorrect (if you were using the wrong variable name, the err...

1 month ago | 0

Answered

Boxplot with scaled x-axis?

Use boxchart and specify the xgroupdata input. boxchart(xgroupdata,ydata) Here's an example that orders and spaces the groups ...

Boxplot with scaled x-axis?

Use boxchart and specify the xgroupdata input. boxchart(xgroupdata,ydata) Here's an example that orders and spaces the groups ...

1 month ago | 0

Answered

Signal Analyser - Time Values Query for Re-Sampling

It appears the time values you are using contain duplicate values (or maybe NaNs?), which is not allowed. However, yes, you can ...

Signal Analyser - Time Values Query for Re-Sampling

It appears the time values you are using contain duplicate values (or maybe NaNs?), which is not allowed. However, yes, you can ...

1 month ago | 0

| accepted

Answered

Find differences between 2 tables

You could try using setdiff. If A and B are tables or timetables, then setdiff returns the rows from A that are not in B.

Find differences between 2 tables

You could try using setdiff. If A and B are tables or timetables, then setdiff returns the rows from A that are not in B.

1 month ago | 0

Answered

How do I open this example in matlab?

Click the Copy Command button in the top right of the page, then paste it into your Command Window in MATLAB and press Enter.

How do I open this example in matlab?

Click the Copy Command button in the top right of the page, then paste it into your Command Window in MATLAB and press Enter.

1 month ago | 0

| accepted

Answered

Does anyone has WaveformData data referred in the "Time Series Anomaly Detection Using Deep Learning" example?

The data ships as part of the example. It can be obtained by running the first line of code in the linked example load Waveform...

Does anyone has WaveformData data referred in the "Time Series Anomaly Detection Using Deep Learning" example?

The data ships as part of the example. It can be obtained by running the first line of code in the linked example load Waveform...

1 month ago | 0

| accepted