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Error using datetime/datenum
First problem is you are trying to convert your datetime to a datenum. I hightly recommend keeping it a datetime. What are you t...

5 years ago | 0

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Creating Polar mesh in matlab
See this answer on how to do this using a rectangular matrix https://www.mathworks.com/matlabcentral/answers/438319-use-surf-to...

5 years ago | 0

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export 3 D data
https://www.mathworks.com/matlabcentral/fileexchange/27982-wavefront-obj-toolbox https://www.mathworks.com/matlabcentral/answer...

5 years ago | 0

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Color in Scatter function
There are two ways to specify the color - as the 4th input or with Name-Value pairs. To use the 4th input, follow this example ...

5 years ago | 0

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I'm having trouble drawing the trend
Clearly the two plots have very different x values. That sould be the first thing to explore. Did you mean to include an x input...

5 years ago | 0

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Dividing a string into sub-strings using a for-loop
Why a for loop? I would use strsplit FilesID='data_190830_102602.mem,data_191030_141002.mem,data_191230_101612.mem'; prts = st...

5 years ago | 0

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Is it possible to include LaTeX expressions as text in my code?
It is possible if you use a live script. Live scripts are interactive documents that combine MATLAB code with formatted text, eq...

5 years ago | 1

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How to extract tick label in sequence data
What do you mean you want to extract them? Do you mean set them? Look at the xticks and xticklabels functions. x = linspace(0,...

5 years ago | 0

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Create 3D plot using Excel data
When you say you are a complete newbie, my first recommendation is to complete MATLAB Onramp. Your problem has 2 parts Importi...

5 years ago | 0

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Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.
Remove the numbers before you commands. Check that your parentheses are lining up the way you intend. Your first plot command h...

5 years ago | 0

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Answered
Plotting Climate Division by Latitude and Longitude on Map
Specifying the axes in geoshow appears to work for me. ax = usamap('Nebraska'); nebraskahi = shaperead('usastatehi', 'UseGeoCo...

5 years ago | 0

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Answered
Error using plot Vectors must be the same length
Check what the lengths of t and C are. To plot them, they must be the same. The error would suggtest they are not. Perhaps you ...

5 years ago | 0

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Index in position 1 is invalid. Array indices must be positive integers or logical values. (Slution of equation of motion with runge kutta 4)
It looks like you are trying to use y1_2nd as both a funtion and a variable name. It is created as the result of calling functi...

5 years ago | 0

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The "Deep Network Quantizer" app is not working
Please be sure you have met all the listed prerequisites. If you have download or installation problems, please contact Technic...

5 years ago | 0

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Conditional statements on array.
This looks like a job for cummax, along with a logical array (ch 12 MATLAB Onramp). Input = [0,0,0,0,0,5,6,7,25,68,0,0,0,0,0,36...

5 years ago | 1

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what it does mean?
See MATLAB Onramp, in particular Chs 2, 5, 8, 12 & 13.

5 years ago | 2

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contourf function mistake for mapping
It says the issue is with vector X, so the problem is in x./period-1 The result must be strictly increasing or decreasing, and ...

5 years ago | 0

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how to place an annotation one level deeper?
I'm not aware of a way to order the layers. I think my approach would probably be to add a black shape in the image under the an...

5 years ago | 0

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Matlab 2D Movie animation
We don't know what name is, but I assume a list of image files? You are not loading the image first. Load it to a variable, the...

5 years ago | 0

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How to know the name of the current learner in Grader?
Grader does not provide information to the MATLAB workspace about the current learner.

5 years ago | 0

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APP DESIGNER ERROR: Index exceeds the number of array elements (14).
Follow the steps provided in this answer to determine the issue.

5 years ago | 0

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matlab for app designer
It looks like you are sorting characters, not numbers. Did you mean to use str2double instead of num2str? You can't enter an arr...

5 years ago | 0

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import an excelsheet in matlab with timestamp an plot
There are a number of ways to import spreadsheets. You just need to pick one. I recommend readtable. If you import the times as...

5 years ago | 0

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How to fix line that exceeds number of array elements(1)
The error is with avgCO2(i+1). The value at i+1 has not been defined yet, hence the error. You could try defining a value for a...

5 years ago | 1

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Answered
Appending 2 Tables with different column order and different number of columns
MATLAB can use variable names in a table to concatenate two tables even if the order is different. When all the variables are in...

5 years ago | 0

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Reassigning columns to a table
If you keep everything tables, you can use the VariableNames property to indicate which variables are being updated. MATLAB is a...

5 years ago | 0

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Mesh with griddata, how eliminate undesidered extra surface
You can set those points equal to NaN. z=peaks(25); z(12:18,:)=NaN; surf(z)

5 years ago | 1

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Formation of another matrix from where I can Plot Data
I'd start with learning how to import a single file. This page will help you learn how to index your data. I'd also suggest com...

5 years ago | 0

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How to plot data from a matrix using only a line?
You really have two options. Plot markers, or plot a line. You have lots of plotting options in MATLAB. See this page for the ba...

5 years ago | 0

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please help me with this
You have not called TDMAsolver with all the inputs. Notice that it requires four inputs (a,b,c and d).

5 years ago | 0

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