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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...

4年以上 前 | 0

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

4年以上 前 | 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...

4年以上 前 | 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

4年以上 前 | 0

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

4年以上 前 | 2

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

4年以上 前 | 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...

4年以上 前 | 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...

4年以上 前 | 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); ...

4年以上 前 | 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'...

4年以上 前 | 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

4年以上 前 | 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

4年以上 前 | 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?

4年以上 前 | 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...

4年以上 前 | 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 ...

4年以上 前 | 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...

4年以上 前 | 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 +/+. ...

4年以上 前 | 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...

4年以上 前 | 1

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

4年以上 前 | 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...

4年以上 前 | 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...

4年以上 前 | 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

4年以上 前 | 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

4年以上 前 | 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)...

4年以上 前 | 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...

4年以上 前 | 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...

4年以上 前 | 0

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

4年以上 前 | 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...

4年以上 前 | 0

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

4年以上 前 | 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...

4年以上 前 | 1

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