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Duration of time values for separate datasets and plotting on x-axis
set0_time=["085440","091530","092000","093020","100000","100020","101325"]; set0 = set0_time; set0_ydata=[30 50 60 72 82 85 88...

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How can I bring back the command prompt in the command window after it disappeared ??? I cant execute commands !! if I press enter the commands disappear,
In the lower-left corner the status message says "Waiting for input". Does your code call the input function (perhaps with an em...

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How to reopen tabs for different projects
Sounds like you may want to create a MATLAB Project for each of your projects.

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Undefined function or variable 'aviread'. >> aviread('traffic.avi'); Undefined function or variable 'aviread'.
There used to be an aviread function in MATLAB, but I believe it was removed sometime around release R2014b. The recommended rep...

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how i can show in matlab tha sqrt(x^2)=x in symbolic toolbox
That's not true in the general case. A = 1; h0 = 1; dhmax = 2; B = -5; lhs = ((2*A*dhmax + B*h0)^2/h0^2)^(1/2) rhs = (2*A*...

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An absolutely ascending sequence
Those who have said there is no function for this are incorrect. The issorted function allows you to ask if an array is sorted a...

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Strange case of Code analyzer and if-else block
It’s rather obvious that only one of the blocks will execute, and it seems redundant for the analyzer to flag this. In this cir...

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The rotation in the rectangle function in matlab cannot be used, but the 2022 version can be used.
try rectangle('Position',[1 2 5 6],'Rotation',45); catch ME fprintf("This command threw the following error:\n%s", ME...

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How can I fix ODE45 returning a straight line when using specific `tspan` points, instead of showing dynamic behavior over the time range?
Your ode_LR function is defined to accept four input arguments, the two required arguments plus two additional parameters. func...

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error running getting started code
If you're using this matrix: a = [1 3 5 2 4 6 7 8 9]; the warning is correct. The matrix y...

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Using "unique" to identify unique values AND number of occurrences of each unique value
Use the groupcounts function. A = {'AGAP001076-RD' 282 0.67229 'AGAP001076-RD' 285 0.75292 'AGAP001076-RD' 286 0.66957 'AGAP...

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Having trouble printing variables I use as inputs to a function.
Let's look at a few selected lines of your code. The only variable that gets displayed with NaN values is uvwAndrSol so let's fo...

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No matter the NOA matrix I enter, the result I receive is "empty double column vector" and I want to receive a numerical value.
Let's look at the last column of your two matrices. syms phi_a phi_o phi_n %Rotation in a T_a = [cosd(phi_a), -sind(phi_a), 0...

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How to convert a function handle to symbolic function?
Are you hoping to use this fit object as the right-hand side of a differential equation ? If so keep in mind that fit objects ha...

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bitshift in matlab vs ishft in fortran
Instead of using bit operations yourself, why not just use typecast? t = 'int32'; x = randi([intmin(t), intmax(t)], 1, 2, t) %...

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N-dimension curve fit how to
See the Multiple Regression section on this documentation page. While that example only uses the first power of each of the vari...

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Is there a meaningful guideline on when to use parentheses vs square brackets vs curly brackets in writing MatLab code?
Parentheses Generally speaking, using parentheses to index into a variable usually does one of two things. If the variable is ...

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How do I print a % character into a file
If you don't need str inside your code other than to write it to the file, rather than creating it just write directly to the fi...

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Why do we get MATLAB fatal errors saying “Access violation detected”?
Please contact Technical Support directly using this link. Send any crash log files to Support and work with them to determine t...

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Why is 0.3 - 0.2 - 0.1 not equal to zero?
Starting in release R2024b, you can use the isapprox function to determine if two values are approximately equal to within a tol...

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Colon operands must be real scalars
For the expression you gave there are a few possible "reasonable" solutions for what it returns. [But it may not do what you thi...

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Heatmap doesn't show the values
Let's check that you're using the heatmap function included in MATLAB and not a different heatmap.m that you've written yourself...

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Some indices in indexed images made with cmunique are 0, what does that really mean? Isn't is a bug? I cannot index a colormap with index=0. Documentation is contradictory.
0 is a nonnegative integer value. isZeroNegative = 0 < 0 % false isZeroInteger = 0 == round(0) % true If you're using Imfig_i...

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assign the fields of a structure correctly
Is d1 a struct array whose fields you need to rearrange? d1 = dir(which('bench.m')) If so you can use orderfields. I'm going t...

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Differenece between "MATLAB for the MathWorks Certified MATLAB Associate Exam" and "MATLAB Fundamentals"
If you click "Learn More" in the "This course will be discontinued" banner on that course, it suggests the "Build MATLAB Profici...

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error in symbolic convolution using integral and isAlways
Are you trying to tell MATLAB that % lam_f > 0 & u_f > 0 & sigma > 0 or are you trying to ask MATLAB if those three conditions ...

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How to stop unwanted rows being added when constructing a matrix in a for loop
Since you're creating matrices with diagonal bands, consider using the diag or spdiags functions. n = 7; mainDiagonal = diag(6...

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Individual User License usage conditions
Please contact Customer Service directly using this link or contact the Sales department directly using this link for help with ...

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Issues using 'readtable' (MATLAB 2024a)
Let's check that you haven't accidentally defined a length.m function that does not behave the same way as the one included in M...

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Problems with query points
According to the information you provided when you asked the question, you're using release R2023b. Looking at the documentation...

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