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

1 year ago | 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...

1 year ago | 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

1 year ago | 0

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

1 year ago | 1

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

1 year ago | 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...

1 year ago | 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...

1 year ago | 0

Answered
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); ...

1 year ago | 0

Answered
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'...

1 year ago | 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

1 year ago | 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

1 year ago | 1

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Answered
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...

1 year ago | 0

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Answered
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 ...

1 year ago | 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...

1 year ago | 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 +/+. ...

1 year ago | 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...

1 year ago | 1

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

1 year ago | 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...

1 year ago | 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...

1 year ago | 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

1 year ago | 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

1 year ago | 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)...

1 year ago | 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...

1 year ago | 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...

1 year ago | 0

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

1 year ago | 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...

1 year ago | 0

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

1 year ago | 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...

2 years ago | 1

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