Answered
How to do a gauss partial pivot?
A = [1 2 3; 2 -1 1; 1 1 1] A./abs(max(A,[],2))

5 years ago | 0

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Answered
Question about sorting an array column by column
choose_data = sort(choose_data) will sort every column independently. Ascending sorting is the default, so you don't need to sp...

5 years ago | 0

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Please explain how does this file work?
Because it does look like MATLAB code, it looks like you could add a .m extension to the file, and run it normally. I'm not sur...

5 years ago | 0

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What " *.form='full' " means in making structure??
This is a GAMS question, not a MATLAB question. It looks like this page from the GAMS documentation discussing the form field. ...

5 years ago | 0

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Error in line for CVX
I don't know CVX, but the error message seems straightforward. My best guess is that m is a variable of type cvx, and you are tr...

5 years ago | 0

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How to change variable value for every iteration in a for loop?
for na = 1:length(a) for n=1:length(x) %Coefficient of Lift at each panel l(n) = f(n).*(a(na))-((z(n)).*(...

5 years ago | 0

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How to plot specific values from a matrix of 10*10
M = [0 1 0 2; 0 2 0 3; 0 3 0 4]; colsToPlot = not(all(M==0)); figure plot(M(:,colsToPlot))

5 years ago | 0

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How to set a column vector as a legend name within multiple plots?
Don't take the transpose: legend(strcat('Alpha=',num2str(a1)))

5 years ago | 0

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Answered
Index exceeds the number of array elements (1).
When you make this assignment: T_o=10+15.*sin((Hour-9).*(pi/12)); it looks like T_o is a scalar (i.e. length 1), but then you ...

5 years ago | 0

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Feature request for postgres support
At least for the first two features, can't you just execute them directly as SQL statements?

5 years ago | 0

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Need to delete outliers by seeing the plot
data = data(data>-4);

5 years ago | 0

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how to read mixed date and data
I would try the readtable function. You can specify the input formating if needed.

5 years ago | 0

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How can I get multiple plots on one graph, not overlapping?
What an ugly and potentially confusing plotting style. Too bad you are being coerced into doing it that way. One way to do this...

5 years ago | 0

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How to convert string to double array in table
% My best guess at your data A = {'[28.346853874154966, 284.04836936606813, 57.820072802912115, 64.72700622938805]'; '[16.5200...

5 years ago | 0

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Answered
How to delete specific cells according to the condition from cell array?
This line of code will identify the cell locations that have a 7x4 array, having those two elements equal: deleteIdx = cellfun(...

5 years ago | 1

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Is there a way to set the color tag attribute in macOS with MATLAB?
Yes, it is possible. Here is the github repo of a command line tool that will manipulate tags. You can call that command line ...

5 years ago | 1

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Answered
How can I get data from evaluating a function, say y=x^2+5 and put it in table?
x = linspace(0.1,0.9,50); y = x.^2+5; tbl = table(y.');

5 years ago | 1

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Linear regression fit model for Multi-variant responses
I think you need mvregress.

5 years ago | 0

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Plotting data against time
New answer based on your update. The problem is that your original time series is in two different formats -- not including the...

5 years ago | 0

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Plotting data against time
Works for me, when I correctly specify valid dates using the input format. I'm guessing that your datetime is somehow messed up...

5 years ago | 0

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How do I display multiple num2str in a single row
I expect you'd be much better off using sprintf to format your output.

5 years ago | 0

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Why am I receiving the error "Array indices must be positive integers or logical values."?
Here is a completely different tack, that I think is less confusing because you just defining the function I(z) more naturally a...

5 years ago | 0

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How can I make an exponential fit using two points of my data.
You can use the 'Weights' Name-Value pair, and heavily weight the first point. Here is a made-up example. Notice how f2 passes t...

5 years ago | 0

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Answered
Why am I receiving the error "Array indices must be positive integers or logical values."?
You have at least two problems with your code. First, you need an explicit multiplication sign in these lines: I(i) = I0*sin(k*...

5 years ago | 1

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Shaded Standard Deviation Corridors
It's because the last three values of x and y are NaN. dataset=xlsread('Book1.xlsx', 'Sheet1'); tensile_stress = dataset(:,1);...

5 years ago | 1

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Visualize a vector field function with matlab
x = -3 : 0.5 : 3; y = -3 : 0.5 : 3; z = -3 : 0.5 : 3; [xx,yy,zz] = meshgrid(x,y,z); Fx = xx.*zz; Fy = xx.*yy; Fz =...

5 years ago | 1

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hold on option is not working in the present code
The problem doesn't really have anything to do with the legend. The fundamental problem is that you first define L as a paramete...

5 years ago | 0

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delete specific rows in a table
I believe this does what you want. Note that this file doesn't have any repeated integer times. So, you don't need the second st...

5 years ago | 1

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Answered
How to access the equation above the while loop
One straightforward way to do this is by using an anonymous function: % Define an anonymous function for the limit f_limit = @...

5 years ago | 1

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Trying to make a code that tells the weather
You should be able to access a weather API (e.g. this free one), using the webread function.

5 years ago | 0