Answered
Using to the 'fill' function to plot a filled polygon that are confidence intervals
Let's draw the region "around" a simpler line. x = 1:10; y = x; plot(x, y, 'k', 'DisplayName', 'Original Line'); legend show...

4 years ago | 0

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How to code "e" by itself in equation e-1?
@Torsten and @Matt J are correct to suggest the exp function, but if the quantity x/a can be very small you might also want to l...

4 years ago | 1

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Previous matrix numbers in the formula and creating a new matrix
The arithmetic operators plus, +, minus, -, times, .*, ldivide, .\, rdivide, ./, and power, .^ operate element-wise. x = 1:5 y...

4 years ago | 0

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Answered
How can I change the variable x0 to x2,x3,x4,...xn . So it still produces the same pattern?
Can you dynamically create variables with numbered names like x1, x2, x3, etc.? Yes. Should you do this? The general consensus ...

4 years ago | 0

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I attached an old Matlab man page from 1982.
I haven't looked at that document but since that was prior to the incorporation of MathWorks in 1984, I'm guessing that's a vers...

4 years ago | 0

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Answered
Improve efficiency of for and if loops
I'm not 100% certain but based on the description I think either ismembertol or histcounts2 (specifically the 4th and 5th output...

4 years ago | 0

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Matlab Unit test framework, general questions about the structure
Taking each question in turn: Documentation how I can understand what part of the online documentation is valid for my current...

4 years ago | 0

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Answered
I'm trying to convert a 1 dimension lat,lon,data to 2d data . Is this possible?
My aim is to regrid the data from original resolution to a desired resolution (ex. 2.5x2.5 degree) and count the number of data ...

4 years ago | 1

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Print matrices whose name is based on loop values
Can you dynamically create variables with numbered names like k1, k2, k3, etc.? Yes. Should you do this? The general consensus ...

4 years ago | 2

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Answered
Take values greater than 0 excluding NaN
A = [NaN NaN 1; NaN -2 -3; NaN NaN NaN; 2 NaN -3; NaN -3 -3; 1 -1 0] % Adding an explicit 0 B = A; B(B <= 0) = 0; B(B > ...

4 years ago | 0

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Answered
n E Z => sin(n*pi) = -1 ?
Use the sinpi function. n = 100000000000000000000000000000; sinpi(n)

4 years ago | 2

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Remove duplicate edges of undirected graph
Call simplify on your multigraph (you can tell if your graph or digraph is a multigraph using ismultigraph) to convert it to a s...

4 years ago | 0

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Answered
Plotting a multidimensional array (or a 3D matrix)
What type of plot do you want to create? Look at the thumbnails in the Plots Catalog (the Plots tab of the Toolstrip) and see on...

4 years ago | 0

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Remove nodes in a graph based on label name instead of index
B = graph(bucky, string(1:60)); % Use '1' through '60' as names head(B.Nodes) % Show the first few node names B2 = rmnode(B, '...

4 years ago | 1

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Answered
undefined function error for builtin toolbox function
If this recurs in the future, you don't need to reinstall. Likely you had a directory on your MATLAB path that contains an imple...

4 years ago | 0

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2D-Histogram with log y and x ticks
Instead of using hist3 I recommend you use histogram2. edges=2.^(-8:0) % Set the lower limit to be whatever will cover your dat...

4 years ago | 0

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Answered
Reading numbers from String
Yet another approach: str = {'SRm40_','SRp5_'}; str = replace(str, 'm', '-'); % Handle negative numbers str = replace(str, 'p...

4 years ago | 0

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Create Categorical array for histogram on R2020a
I tried running those three lines of code in release R2020a and it produced the categorical histogram plot that I expected. Wha...

4 years ago | 0

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I generated code in MLSL in R2022b pre-release and have this error "File could not be copied. LWS Export failed". How could I solve this issue?
Please send any questions or feedback related to a Prerelease of MathWorks products to Technical Support directly instead of pos...

4 years ago | 0

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Alternative to 'findpeaks'
See the islocalmax function that is part of MATLAB.

4 years ago | 3

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there is no output, it's keep running but no output, why so?
Let's look at the value of your integrand at the starting values. ti = 0; %inital time tf = 100E-4;% final time tspan=[ti tf]...

4 years ago | 1

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Properties of Polaraxes in App Designer not working
As a high-level plotting function, by default polarbubblechart will reset most of the properties of the polaraxes to their defau...

4 years ago | 0

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Answered
Choosing the best algorithm for fmincon
I haven't seen anywhere the ability to assign first-order optimality to a variable. Take a look at the documentation for the ou...

4 years ago | 0

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Answered
Ordinary differential equations for a buckled column
The "Solve Nonstiff Equation" example on the ode45 documentation page bears some resemblance to your ODE if you replace in the ...

4 years ago | 0

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Plot one data set with two different units?
Let's plot some sample data on the left axes. yyaxis left plot(1:10) Now add a right axis. yyaxis right Change the Y limits...

4 years ago | 0

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Wrong behavior of symbolic number creation in R2022a
Did you change your symbolic preferences without realizing it? sympref('FloatingPointOutput',true); x = sym(1/3) sympref('Flo...

4 years ago | 0

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Answered
How to use xline?
The ability to create multiple vertical or horizontal lines by passing a vector of values into the xline or yline functions was ...

4 years ago | 0

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Answered
Storing a Matrix Output in a matrix
You have 4220 (= 844*5) eggs and an egg carton with 844 cups. How can you fit all 4,220 eggs into 844 cups (and no, scrambling t...

4 years ago | 0

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Answered
I'm new to Matlab and still learning, how do I go about solving this problem in simple terms?
initial=1000; month = 1:1:120; You don't want this to be a vector. Make it a scalar (one number) that represents the month who...

4 years ago | 0

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Answered
Error in svd in r2018a
Are you using Update 3 of release R2018a or a later Update, or are you using release R2018a (no Update) or Updates 1 or 2? If y...

4 years ago | 0