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How to group data according to date in years?
Since 'dayofyear' won’t work, break the dates down into two new variables, specifically the day and the month, then group on the...

5 years ago | 1

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Answered
How to label the farthest x point
Consider perhaps ... v0=75;%initial velocity of 75m/s g=9.81;%force of gravity 9.81 m/s^2 theta=[0:(pi/100):(pi/2)]; %values...

5 years ago | 0

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High-precision IFFT
Since it appears that these calculations are all symbolic, one option would be the ifourier function, or if you are using your o...

5 years ago | 1

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Answered
How to calculate Area under a curve (negatif side)
I went with the patch function because I’m more familiar with it. Try ths — f = [-0.390930468901234 -0.346778353936444 -0.3...

5 years ago | 1

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how to calculate wavelength of texture ?
Consider using the smoothdata function to eliminate the high-frequency noise. After that, first, use the detrend function to re...

5 years ago | 0

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Answered
Curve Fitting of large Data Measurement?
Try this — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/871405/Measurement%20Data.xlsx', '...

5 years ago | 1

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Answered
How do you solve this on matlab
I would use the null function.

5 years ago | 0

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I want to write this transfer function (0.7/s^2)*sin(0.05) in MATLAB code, but sine make it complicated. Kindly, how can I make that?
Since the sin call creates a constant and is not itself a function of ‘s’, evaluate it first and then just multiply it as with a...

5 years ago | 0

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Answered
About Adding Lines to Your startup.m file
See the documentation on startup I believe that it now has to be in (Windows machines): C:\Users\<UserNAme>\Documents\MATLAB...

5 years ago | 0

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error with changing color of marker using scatter3
This is the best I cand o. See Plot Table Data with Custom Marker Sizes and Colors for a more extensive discussion. Tabl...

5 years ago | 0

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How to convert time column into a regular array?
If the time series are a datetime array, they can easily be plotted as funcitons of that variable. It would be best to convert ...

5 years ago | 0

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Answered
Loop to replace outliers with NaN extremely slow
The way the table addressing is coded is likely the problem. I’m not certain, however using parentheses () addresses the tabl...

5 years ago | 0

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Average of two dataset
I cannot reproduce that problem here (R2021b). However, to compare all values for both curves, the (x1,y1) values need to be ...

5 years ago | 0

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I cannot extract data from syms surface plot: Struct contents reference from a non-struct array object
I can’t run the posted code because there are missing elements. Neverhteless, everything necessary to extract the data and re...

5 years ago | 0

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can't find line of best fit from simple code
The first argument to plot must be the independent variable vector. When I added that, it works! (I broke out the polyval ca...

5 years ago | 0

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Answered
A compact way to find elements of an array which are greater, equal, or less than the elements of a second array
To check all the elements against each other — a1 = [0 4 7 8 1 2 3]'; a2 = [4 4 6 9 9 1 1]'; Check = sign(a1 - a2.') ...

5 years ago | 1

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Generate new samples from available data
This seems to be an interpolation problem, such that the original data are created by the original values, and the desire is the...

5 years ago | 0

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Error "Cannot Create Output File" When Trying to Save Figure
I don’t often use print however it appears that the first argument needs to be the file name to print to. The argument order is...

5 years ago | 0

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How to call a function with multi variable in real coded GA in function handle and how to define upper and lower bound of that variable in matlab?
If ‘Torque’ is the fitness function, it should be coded as: function T = Torque(p) % % % MAPPING: a = p(1), b = p(2), c = ...

5 years ago | 0

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the for loop is only giving me the last value
There are likely a lot of zeros in the vectors because of the way ‘i’ is defined. The loop is likely not necessary anyway. ...

5 years ago | 0

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How to fit data to a function form
Yes! The mldivide,\ funciton will do this. x = randn(10,1); y = randn(10,1); z = randn(10,1); w = randn(10,1); DM = ...

5 years ago | 1

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Is it possible to rectify the figure such that the zig-zag effect doesn't occur?
Using one of the sort functions to sort on the independent variable could work. Remember to sort both variables by the same sor...

5 years ago | 0

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Transfer Functions and Pole Zero forms
The Control System Toolbox tf and zpk functions could be helpful.

5 years ago | 0

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How do I crop a matrix in MATLAB based on contents of one column?
I am not certain what the matrix is, or whether there are other missing entries in the matrix. If only the 5th column has missi...

5 years ago | 0

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Answered
how to fit ylabel for the plots?
One possibility — left_offset = 0.01; set(ylh, 'Rotation',0, 'Position',ylp+[left_offset 0],'VerticalAlignment','middle', 'Ho...

5 years ago | 0

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extrapolate data to cross x axis
There are 19 variables in that .mat file. I have no idea which ones are to be extrapolated, so I took a wild guess on two of th...

5 years ago | 0

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finding matrix base on linear equation
I’m not certain what the desired result is here. Try this — x = linspace(-10, 10, 5); y = -0.15*x-21.3; X = [x(:), ones...

5 years ago | 0

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Can I eliminate roundoff error caused due to floating point arithmetic limit in MATLAB?
Floating-point approximation error is simply inherent in binary representations of floating-point numbers. The best way to deal...

5 years ago | 0

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What can I use instead of 'lsqcurvefit'
The ga function in the Global Optimization Toolbox does not use gradient descent and is therefore more resistant to getting hung...

5 years ago | 0

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Trying to find an x value from a certain y value on my graph
I will re-post my original Answer because I believe it addresses the problem (although without the data, it is difficult to dete...

5 years ago | 0