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How to update table with new data with a GUI
% create (pre-existing) table: t = uitable( ... 'ColumnFormat',{'char' 'char' 'numeric' {'Coke' 'Pepsi' 'Dr. Pepper'} 'log...

4 years ago | 0

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Define the vectors x equals open square brackets table row 1 2 3 4 5 end table close square brackets and y equals open square brackets table row 3 6 9 12 15 end table close sq
List of relevant mathematical operations in MATLAB (continued from here): Use log10 to take the base-10 logarithm of something

4 years ago | 0

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How to evaluate this expression
Here's a list of relevant mathematical operations in MATLAB, for reference: Use cos for cosine when the angle is in radians Us...

4 years ago | 0

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Trying to plot 4D data
In the sample image, it looks like Z = U, i.e., the color of the surface corresponds to a U-value which is equal to the Z-value ...

4 years ago | 0

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How do you plot with missing data?
If you know where the missing element(s) belong(s), put NaN(s) there, which will give you a disjointed line: Year = [2000 2001 ...

4 years ago | 0

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I am currently in the middle of an assignment in my coding class and I need help or suggestions.
The correct syntax for that last line is: [~,~,ALL] = xlsread('WeatherData.xlsx'); The two "~" say to ignore the first two out...

4 years ago | 0

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Index in position 2 is invalid. Array indices must be positive integers or logical values.
This error happens because some element of IY is zero (could've just as easily been IX). That happens because round(N*IY) return...

4 years ago | 0

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Problem with sum in cell
y = repmat({randn(1,99)},5,2000,5); % making a cell array like yours yf = mean(vertcat(y{:,1000,1}),1) % performing the mean ...

4 years ago | 1

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Answered
Plotting powers of 10 on the colorbar
You can use naturlal log (log) or base-2 log (log2) (but I think log10 makes the most sense): col = colorbar('XTickLabel', {'10...

4 years ago | 1

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How to store elements into a row of an array with for loop?
dates(k,:) = [day month]

4 years ago | 0

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How can I use the values from the same position in two different matrices as the row and column subscripts for a third matrix?
A=[1 3 2 2 2 1 3 1 3]; B=[2 2 2 1 2 1 3 3 2]; C=[120 234 60 41 248 184 94 194 200]; D = C(su...

4 years ago | 0

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How to efficiently extract 2-D data from multiple text files and save it as a single 3-D variable?
Using sprintf to construct your file names will make that easier. Also, you only need one additional loop (loop over years) to w...

4 years ago | 1

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Answered
How do I convert a vector into an Nx1 cell array of varying-length vectors?
A = [1 2 3 4 5 6 7 8 9 0]; % sizes = [3 3 3 1]; nA = numel(A); % get as many groups of size 3 as you can from A: sizes = 3...

4 years ago | 0

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How to remove horizontal spacing between subplots?
It looks like plotting the alphaShapes (e.g., LITS31) sets the DataAspectRatioMode of the axes to 'manual' so that although the ...

4 years ago | 0

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Title for a color bar
col = colorbar('XTickLabel', {'10^{10}', '10^{11}', '10^{12}'}, 'XTick',log10(1e10):1:log10(1e12)); caxis([log10(1e10) log10(1e...

4 years ago | 2

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Answered
Recompose stacked column cell vectors into adjacent row cell vectors
Here's one way: varargin = { [1;2] ["cat";"dog"] }; % convert each element of varargin to a (2x1) cell array: temp = cellfu...

4 years ago | 0

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Answered
How to convert a col array into a struct array field?
a = [1; 2; 3; 4; 5; 6; 7; 8; 9; 10]; % 10-by-1 struct array (doesn't need to have a field % 'a' - doesn't need to have any ...

4 years ago | 0

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Answered
Sum of every column with every column
% a small example to test with % the four loop way: ma = 2; na = 3; mb = 4; nb = 5; A = randn(ma,na,3); B = randn(mb,nb,3...

4 years ago | 0

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Matrix that changes size
One thing you can do is to pre-allocate COORD to be the correct size after NJ is input by the user. (And if this code is used in...

4 years ago | 0

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Preallocation Problem in for loop
If you know that every element of c has the same number of instances of 'x(...)', i.e., you know extractBetween returns the same...

4 years ago | 0

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How to aviod the following for loops
N=1000; M=200; K=256; U=rand(N,M)+1i*rand(N,M); V=rand(N,M)+1i*rand(N,M); B=rand(N,K); const_c=2; const_d=0.5; % no lo...

4 years ago | 1

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App Designer ListBox ValueChanged Callback with multiselect 'on'
Try this (note the square brackets [ ]): % Use array of double to index into data struct and get all of % the runs for the tes...

4 years ago | 0

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Surface AlphaData not working as expected
You can set AlphaDataMapping to 'none' to get those Alpha values to be interpretted correctly: % generate grid [x,y] = meshgri...

4 years ago | 1

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How to extract numbers either side of a decimal place
X = [1;2;3;4;5.4700;6;7;8;9.4100;10;11;12;13;14;15;16.4200]; X_int = fix(X); X_frac = X-X_int; X2 = sort([X_int; round(X_fr...

4 years ago | 1

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How can I print text opposite the number I found in column 1?
L = [11 49 0.8]; % lib=xlsread('newlib.xlsx') % just need to read the file one time [lib,txt,raw] = xlsread('newlib.xlsx') fo...

4 years ago | 0

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How to display a matrix of matrices?
Your variable grid is what's called a cell array. Specifically it is a 3-by-3 cell array of 2-by-1 numeric vectors. format comp...

4 years ago | 0

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I do not know how to transfer data from a "sym" to a matrix
You can use double(): A = sym('a',[2 2 2]) A = equationsToMatrix(A) double(A)

4 years ago | 0

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How to move colorbar inside the subplot ?
Here's how to do some of the things you don't have yet: data = (1:10)+randn(1,10); ylimits = [floor(min(data)) ceil(max(data))...

4 years ago | 0

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Building a bank of typed letters MATLAB app
You can try this: function ButtonPushed(app, event) val = string(app.TextArea_2.Value); new_val = string(app.EditFiel...

4 years ago | 0

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plot 2D gride
x = 1:15; y = 1:15; % some 225x1 Pressure values: Pressure = reshape(5000-abs(2*x-y.'),[],1); size(Pressure) % reshape Pres...

4 years ago | 0