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what is the error? Example?
Invalid syntax: function w=ket(;5) Inside the parentheses in a function definition should be a list of variable names. ";5" is...

3년 초과 전 | 0

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Speed up plotting of multiple lines
Here's an idea: plot all the line segments of a given color together as one line object. That way you have 2745 lines instead of...

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Shuffle row order within every N rows in a matrix
Here's one way: I'll use a different matrix that makes it easier to see that the process works: data = repmat((1:8).'+(0:4),2,...

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why is my ea not being recognized?
ea is not defined because f(xl) * f(xu) >= 0 L = 1.25; E = 50000; I = 30000; w0 = 2.5; syms x f(x) = (w0/(120*E*I*L))*(-x^5+2...

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Change half of my plotted shape a different color
x = [0 7 4 10 3 0 -3 -10 -4 -7]; y = [0 -5 4 9 9 16 9 9 4 -5]; I shift the order of the points in x and y so the top part of t...

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How to omit/edit some elemental coordinates of a matrix
nye=10; nxe=20; dx=1.433; dy=1; % T=is the matrix including the centre points of the grid elements in the order of numbering...

3년 초과 전 | 1

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Why are all the negative values in the matrix show as 0?
reltime is of class uint32, as shown here: load Foveal T = ans; class(T.reltime) An unsigned integer cannot be negative. If...

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How do I sum the values of sections of a table?
table_a = readtable('Data1.xlsx'); %Create the new vector, schoolyear for i = 1:height(table_a) if table_a.month(i)>=8 ...

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error in .m file Line: 1 column: 1 invalid text character - line 1 all #
"#" is not used in any MATLAB statements or expressions, unless it's inside a string or character array. Use "%" for comments.

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I made a logarithmic graph, and I want to add a continuous linear line that follows the equation y = x with x values from 1 to N.
Perhaps you mean: plotyy(1:n,factorial,1:n,x)

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Extract data points from a plot corresponding to the plot legend
Here's one way: f = openfig('ExampleData.fig'); lines = findall(f,'Type','line') line_props = cell(1,numel(lines)); for ii =...

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How can I increase the size of matrices in cell arrays with each iteration of a loop?
A 10x10 cell array where each cell contains a 1x3 vector: C = repmat({[0 0 0]},10,10); Another 10x10 cell array where each cel...

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How to make a statement true for column 5-6?
'is there a better way to express "column 5-6"' Yes. You can use all(). Specifically, all(~isnan(__),2) where the 2 tells all(...

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How to split the last 4 elements in a column into a new column?
M = [5; 7; 2; 3; 6; 4; 9] You can't use a matrix, like you said, because the lengths of the two new column vectors is not the s...

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How to find the number of groups in another group?
M = [ 0 1 0 2 0 3 0 1 0 2 0 3 0 4 0 5 0 1 0 2 1 1 1 2 1 3 ...

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mesh or surf from x y z coordinates
Maybe something like this: load swarm data = vertcat(f{:}); data = cell2mat(data(:,1)) I = scatteredInterpolant(data(:,[1 2]...

3년 초과 전 | 1

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How to select fields of a struct that contains certain string?
Maybe something along these lines: load table selected = []; for ii = 1:numel(trial_table) msg = {trial_table(ii).tria...

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Round values to specific number
"want something that will suit not only 100, but any desiried number" You can do round(val./d).*d where val is the original num...

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How to use if/then to create a vector using values from a table.
"is this the proper way to use if/then to create the schoolyear vector? Is there another way you would do it using if/then?" Lo...

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How to extract data from different strata?
data = xlsread('Dataset.xlsx') data(:,end) = fillmissing(data(:,end),'previous'); stratadata = splitapply(@(x){x},data(:,1:end...

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Plotting graph for iterations of a for loop
First, let me run the code that calculates R: alpha_0 = [-1,-0.5,-0.1,0,0.1,0.5,1]; N = numel(alpha_0); R = nan(3,N); for a...

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How to combine data from 3 different arrays?
You can cat along the 4th dimension. Here's an example with random data: A = 10; B = 5; C = 8; G1 = 3; G2 = 6; G3 = 7; ...

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Plotting Graph using data stored in Properties (app.property) in App Designer
In Button2Pushed, x, y, and z should be app.x, app.y, app.z.

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plot function overwrites axes
If you haven't called hold on (or otherwise set the 'NextPlot' axes property, which is what hold does), then plot() does other t...

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Index exceeds the number of array elements. Index must not exceed 1.
The first time through the for loop, i is 2, so on the right-hand side of your equations you are accessing x1rec(1), x2rec(1), y...

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How can I draw contour lines in my problem ?
load Behi1 data = cell2mat(POFDE1); I = scatteredInterpolant(data(:,[1 2]),data(:,3)); [lat,lon] = meshgrid(unique(data(:,1))...

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matrix addition according to position vector
A=[1 3 5 7 9 11; 2 4 6 8 10 12]; b=[1 1 3 4 5 3]; Maybe something like this: C = zeros(size(A)); ub = unique(b); for ii...

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Find all row values from A matrix that match values of B matrix iterating thro rows from B matrix.
A = [3 6 9 12 2 4 7 4 5 3 1 10 5 6 8 9 10 11 ] B = [2 4 6 7 5 1 3 7 8 11 2 6] [ism,idx] = ...

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How can I extract a specific row from a table?
load DateToFind result = T(ismember(T.Date,Date_to_find),:) Then, if you want those temperatures in a matrix with 9 columns:...

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Graphic error with text annotations on app designer UIAxes
This is the expected default behavior; by default text objects have their Clipping property set to 'off'. The Clipping property ...

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