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Having issues with a function: creates NxN matrix instead of a column vector
Are the inputs p, sigma, N scalar values or vectors? Does normrnd return a vector or a scalar? That seems to be a function you w...

más de 4 años hace | 0

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Interval where values are greater than treshold
I believe you are looking for the find command. find(Logic)

más de 4 años hace | 0

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How can I shade confidence intervals and assign colors to frequency spectra plot (pwelch)
The plot commands accept a 3 element vector in place of the built-in colors, each element being a number between 0 and 1 represe...

más de 4 años hace | 0

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Add error bars to grouped bar plot
Like this? https://www.mathworks.com/help/matlab/creating_plots/bar-chart-with-error-bars.html

más de 4 años hace | 0

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How map values of array to 0 and 1
normalized_array = normalize(array,'range',[0 1]);

más de 4 años hace | 2

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Brace indexing is not supported for variables of this type
Mu_s{:} < 1.0 && Mu_d{:} < 7.0

más de 4 años hace | 0

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Using now() in different time zones (or with daylight saving time)
From the documentation for now Limitations MATLAB Online returns the current date and time in Coordinated Universal Time (UTC...

más de 4 años hace | 0

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Having an array V from 0 to 44.8 in steps of 0.01, I try to use the function find(V == 30) and I get and empty array. Why?
I suspect this is a case of roundoff error. A workaround would be find(Volt > 29.999 & Volt < 30.001); Using whatever toleranc...

más de 4 años hace | 0

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The code runs, but imediately deletes the animation and does not update
delete(P1_pos_cir); delete(P2_pos_cir); delete(P3_pos_cir); delete(P4_pos_cir); delete(P5_pos_cir); ...

más de 4 años hace | 0

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Confusion manipulating timestamp and plotting
Is each number supposed to represent a datetime as a "datenum" data type? t = 0.0517361112797516; d = datetime(t,'ConvertFrom'...

más de 4 años hace | 0

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How to include string + numbers in a table using a for...end routine
It sounds like you might want to use the command readtable This will read your entire spreadsheet as a table data type

más de 4 años hace | 0

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Error while using writematrix to save complex values in a .txt
csvwrite Does this correctly. I will look into writematrix

más de 4 años hace | 1

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Warning: Executing startup failed in matlabrc. This indicates a potentially serious problem in your MATLAB setup, which should be resolved as soon as possible. Error detected was: MATLAB:calllib:MethodNotFound Method was not found.
Did you move or delete a file or rename one of the Matlab directories?

más de 4 años hace | 0

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Using fzero to solve an equation with different constants every time
x0=[0;1]; By passing a vector into fzero you are telling it that you think the solution is between these values, so it will sta...

más de 4 años hace | 0

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How do I get the date out of a filename using regexp?
str = 'xxx_2014_06_03_00_00_01'; id = regexp(str,'\d') Returns: id = 5 6 7 8 10 11 13 14 16 ...

más de 4 años hace | 0

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Solving non-linear equation including natural logarithm
Most probably, there is no analytical solution for y in terms of (a,b,c,x). You can solve numerically for y at given values of a...

más de 4 años hace | 0

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how to mathematical modelling the solar PV in Simulink?
Hi, The "sum" block in the "Photo Current" subsystem is meant to be +/- according to the model - your current setup has a +/+. ...

más de 4 años hace | 0

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How can I extract a certain numerical value from a text file?
I have written a similar function - something along the lines of fopen(fid) while feof ~= 1 str = fgetl(fid); if str...

más de 4 años hace | 1

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Error when opening a variable
What exactly are you doing to encounter this error? Are you using load ?

más de 4 años hace | 0

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Distance between all points in array and delete the second point if it is less that certian value (Victorized)
Something like this? n= 1000; Rx=rand(n,1)*0.2; Ry=rand(n,1)*0.2; Rz=rand(n,1)*0.2; R_all=[Rx Ry Rz]; Df=0.002; Dr = diff...

más de 4 años hace | 0

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Using a for loop to put a number of 2D arrays in a directory into a single 3D array
I misread at first, so I'm editing: If you read in 3 2D arrays you can concatenate them - if A,B,C are each 2D then D = A; D...

más de 4 años hace | 0

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Solving System of Equations
Typically I prefer doing it numerically by putting my equations into the form Ax=b and then x = A\b

más de 4 años hace | 0

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Using ODE45 to solve Rossler equations
You are correct ode45 appears to be stuck. But if you try ode15s it appears to work

más de 4 años hace | 0

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Error when trying to enter in a simple matrix
The little red underlines are not just there for decoration - sin^2(x) is not valid syntax in matlab. I think you want sin(psi)...

más de 4 años hace | 0

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Second Order Runge-Kutta Method for Problem
The ode solvers built into MATLAB are based on the runge-kutta method. Are you meant to implement your own method, or can you us...

más de 4 años hace | 0

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sinc(pi) doesn't give zero
Since pi is an irrational number and cannot be represented exactly by a finite number of binary digits, there is always going to...

más de 4 años hace | 0

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Input formula to be used in a function
It sounds like you want polyval ?

más de 4 años hace | 0

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Finding all numbers which is divisible by 5
Hi, In your mod command you want to compare the number variable to 5, not a (a doesn't change). This is why you're getting unex...

más de 4 años hace | 0

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Undefined function or variable
Your script runs for me as-is

más de 4 años hace | 0

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How to select a value in a matrix based on a pair of vectors?
The easiest way I thought of was to use a loop. It's made awkward by the fact that your index for girls is the opposite of the d...

más de 4 años hace | 1

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