# University

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Question

Determine the direction of travelling waves in Fourier Analysis
% I am conducting a FFT analysis and i I observed that there is travelling % wave. Please, how do I determine the direction of ...

21 hours ago | 1 answer | 0

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Question

Draw an arrow on a plot
Please how can draw an arrow on each of this plot showing the direction for increasing time.

3 months ago | 1 answer | 0

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Question

Plotting a single contour to divide a region into two
In the figure I attached, I have oscillatory region and non-oscillatory region. Pleas how can I plot a single contour line that ...

6 months ago | 1 answer | 0

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Question

Why fft don't find oscillations ?
I'm trying to find an FTT of an oscillatory data. In the first figure, you can observed an isolated white region. In this region...

6 months ago | 0 answers | 0

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Question

Find the roots of transcendental algebraic equations
Hello, I have a transcendental equation that has real and imaginary roots. I used MAPLE to solve the algebraic equation but it M...

6 months ago | 0 answers | 0

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Question

Parameter estimation of SEIHRDBP model
% I am back please. I have gotten the data correct data with date. The whole idea is that I want the parameter estimation for pa...

6 months ago | 1 answer | 0

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Question

Parameter estimation of SEIHRDBP model
% I want simulate "parameter estimation of SEIHRDBP Model", where % S=susceptible, E=exposed, I=infected, H=hospitalised, R=rec...

7 months ago | 1 answer | 0

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Question

How to find corresponding frequencies for frequency magnitudes in FFT analysis
% I computed the fft for 10 values of xi and % 10 values of l as shown below. I am trying to determine which values % of xi an...

7 months ago | 1 answer | 0

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Question

How to add a legend for multiple figures with horizontal and south location
% Please how can add one legends for the subplots. I want the legend % location to south and horizontal. I also want to break t...

7 months ago | 1 answer | 0

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Question

I am tried load multiple structures from a folder but I got a error below: filepath = '..\sol_active_case11\'; mydata = dir...

7 months ago | 1 answer | 0

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Question

The logical indices contain a true value outside of the array bounds
Please, how can I tackle "The logical indices contain a true value outside of the array bounds" error? I don't what exactly is t...

7 months ago | 1 answer | 0

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Question

The logical indices contain a true value outside of the array bounds
I am trying to test the following conditions: if intabsul == absintul && intabsur==absintur returns the corresponding entries...

7 months ago | 1 answer | 0

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Question

How to return corresponding entries of an array using if statement
Please how can I handle this: I want to use if statement such that if intabsul == absintul && intabsur==absintur returns th...

7 months ago | 1 answer | 0

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Question

x or y intercept for 2D data
I have a 2D data of the form u(y, xi, l). Ie., 31x20x20, where 31 are values of y, 20 are u values that corresponds to 20 xi val...

7 months ago | 0 answers | 0

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Question

How to make contour to have the same axes
I have a two different plots with 2 different axes. The second plot (fig2) is extracted from the first plot (fig1). Please how ...

7 months ago | 0 answers | 0

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Question

Why is matlab printing all number of digit.
Please why matlab displaying all the number of digits on the y axis. See the attached figure, the code below produces the fiugre...

7 months ago | 2 answers | 0

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Question

How to make an axis two different plots the same using the aspect ratio and how to set the contour colors the same.
How to make an axis these two different plots the same using the aspect ratio and how to set the contour colors the same? Althou...

7 months ago | 1 answer | 0

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Question

How to match colors of an extracted contour with the colors of the main figure?
I extracted the region for activity, xi = linspace(58, 115) and l=(1.24787e-06, 2.42592e-06) from the figure attached, which is ...

7 months ago | 1 answer | 0

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Question

How to display contour levels for some specific levels
Is it possible to display contour levels for some specific values? Z = peaks; figure [C,h] = contour(Z,8); clabel(C,h) t...

8 months ago | 1 answer | 0

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Question

PLOT SYMBOLS/MARKER FOR TWO SET OF ARRAYS IN A CONTOUR
Hi, I have two set of arrays: xi = linspace(0, 100, 10); L =linspace(0, 0.0001, 10); and a matrix: intul and I have...

8 months ago | 1 answer | 0

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Question

Hi, Lvals = 1:10; xivals = 1:10; % tarray = 1:20; nt = length(tarray); % lxi =length(Lvals); nxi =length(xivals); % ...

10 months ago | 1 answer | 0

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Question

Finding x intercept for 2D data
Hi, Please how can i find x intercept at y=0 for 2D array. For instance, I have V which is loop over xi=0:1:10 and l=0:0.1:1....

10 months ago | 1 answer | 0

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Question

sorting list of structures in a structure
I have a list of structures in a structure. I tried this: %% Load data matpath = 'C:\Users\..; mydata = dir(fullfile(matp...

10 months ago | 1 answer | 0

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Question

How to find same values in an array and their index
Hi, I have array with some repeated values. I have 1e-6 repeatedly. How can I have find all the values and their correspondin...

10 months ago | 1 answer | 0

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Question

How to find the position index of vector array
Hi, I have meshgrid on X1 and and Y1 but I have attached only the X1 and x1 and y1 files l=6.6667e-6, l is a line that divides...

10 months ago | 1 answer | 0

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Question

common legend and common for multiple plots
Hi, Please how can include common axes and legend for multiple plots without doing it individually? % Use LaTeX fonts set(gca...

11 months ago | 1 answer | 1

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Question

What is different between FFT and SHIFTFFT
Please can someone explain why this code : fftshift(fft((x - mean(x)).*hann(L), NFFT)/sum(hann(L))) is better than fftshift...

11 months ago | 1 answer | 0

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Question

Finding y-intercept for loop
Hi, In the m.uvals file I 24 x 1 x 31 matrix, 24 are the index of xivals and 31 are the values of u and m.array file is the y...

11 months ago | 1 answer | 0

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Question

How can I find the peak location from the FFT output?
Hi, Please, how can I find the peak location from the FFT output? I have attached my m file

11 months ago | 1 answer | 0