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Star Strider


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14,455 2012 年以降の合計貢献数

Hic sunt dracones!

PROFESSIONAL: Physician (M.D.): Diplomate of the American Board of Internal Medicine; M.Sc. Biomedical Engineering: Instrumentation, Signal Processing, Control, System Identification, Parameter Estimation

NON-PROFESSIONAL: Amateur Extra Class Amateur Radio Operator; Private Pilot, Airplane Single Engine Land, Instrument Rating Airplane; Gamer

NOTE: I do not respond to emails or personal messages, unless they are about my File Exchange contributions.

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How to solve the Gompertz Equation
The reason the red line does not plot is that ‘b’ goes from about 3 to about 32, however ‘E’ is constant at about 451.7. So ‘E’...

約14時間 前 | 0

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Why am I getting "Array indices must be positive or integers values"?
Rhe reason is that ‘up(t)’ was being interpreted as an indexing operation rather than a function call, and ‘t’ are not all posit...

約15時間 前 | 0

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plotting with for loop
To plot all of them on the same axes, put the figure call before the loop instead of inside it: figure hold on for i=1:lengt...

約22時間 前 | 0

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system of ordinary differential equations
Note that it will be necessary to use ODE Event Location to stop and then re-start the integration at the discontinuities (, ) s...

1日 前 | 0

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Plotting Intersection point on plot
Try this: Cpo = -0.75;a = 3.32; M = 0.2:0.01:0.8; Cp = Cpo./sqrt(1-M.^2); Cp_cr = 2./(a*M.^2) .* ((((2+(a-1)*M.^2)/(a+1))...

1日 前 | 1

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Getting an error for quiver 3
MATLAB uses U.S. English spelling conventions. See the Quiver Properties documentation section on Color .

1日 前 | 1

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How to do Z transform with Z^-1 format?
The only option I can think of has nothing to do with the Symbolic Math Toolbox, and is instead the Variable argument in the Con...

2日 前 | 1

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Find absolute, relative, and mean power of theta, beta and TBR (theta/beta ratio)
You can filter them using the approach in Need to break down EEG signals into 4 frequency bands. Once you have the filtered s...

2日 前 | 0

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Why are my staitistic functions returning an array rather than a single value?
The min, max, and mean functions operate on the first dimension that is greater than 1, so for a matrix, they will all produce a...

2日 前 | 0

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Curve classification with interference/disturbance
One option is to evaluate the exponential curve at exactly the same values of the independent variable as the data (that I assum...

2日 前 | 0

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Hello, I am having trouble plotting this graph. Whenever I run my code I get an error that I am not using the plot function correctly or I get a blank graph. I think it may have to do with how I solved my equation for T. Thanks for any help.
You are using the wrong plot function. Use fplot instead: fplot(Teq,[0 1]) xlabel('t') ylabel('Teq') EDIT — (27 Sep 20...

2日 前 | 0

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Generate name of the given plot as output
I have absolutely no idea what you are asking. See if title or figure will do what you want.

2日 前 | 0

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Need help to run this code
To use a function handle in a calculation, it is necessary to evaluate the function so it will be replaced by the numeric output...

2日 前 | 0

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Matlab code for fractions
Use the rat function: x = 1.5 [num,den] = rat(x) producing: num = 3 den = 2 .

2日 前 | 0

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How to plot with 3 matrix
If you want the red and green lines to show, you need to plot them separately, and create handles for them to pass to the legend...

2日 前 | 1

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Error using plot Not enough input arguments.
You may need to use the cell2mat function, or concatenate the elements inside a vector, using this (strange-looking but effectiv...

2日 前 | 0

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Getting FWHM from distribution fitter
One way to get the FWHM is to use the findpeaks function. It may be ‘overkill’ for only one peak, however it should give you th...

3日 前 | 0

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Trying to use findpeaks to isolate the portion of the signal that has a positive slope
This will identify and plot the positive slopes: T1 = readtable('73(4)_interval.xlsx'); Slope = gradient(T1{:,1}) ./ gradient...

3日 前 | 0

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Using text, 2 variables, and decimals in fprintf
Try this: fprintf("The value you entered %.1f°C\nis equal to %.1f°F\n", temp, ans) so: temp = 10; ans = 50; fprintf("The ...

3日 前 | 0

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How to...column vector
colon,:

3日 前 | 0

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change timetable variable (working day to holiday)
Try this: dd = datetime(2016,01,01):days(1):datetime(2016,12,31); % Create ‘datetime’ Array workday = ones(si...

3日 前 | 0

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Multiple plots in a single X and y axis
Use the hold function. Example — x = linspace(1, 2, 250); y1 = sin(2*pi*x*5); y2 = cos(2*pi*x*7); figure plot(x, y1) ...

3日 前 | 0

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How to solve a system of 4 ODEs?
Try this: syms Sh(t) Ih(t) Sm(t) Im(t) Sh0 Ih0 Sm0 Im0 T Y betah = 1000; betam = 300; gammah = 0.004; gammam = 0.06; muh ...

3日 前 | 0

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Solve (a*B) + (c*D) = E without the Symbolic Toolbox
This would seem to be homework, and for homework we only give guidance and hints. I would set it up as an implicit equation (...

4日 前 | 0

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how o count he number of occurences of a string in an external text file?
The function you want is probably fgetl (or related functions) rather than char. Then try: s = fgetl(fid); There are likel...

4日 前 | 0

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For Loop to calculate prob of pair of values occuring
Using the unique function with the 'rows' option may help. If you want to include a tolerance if the elements are °close enou...

4日 前 | 0

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Searching for a line of characters from a text file
It might be easier to use the fileread function to read the entire file in as text, then use strfind to locate the strings you w...

4日 前 | 0

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ERROR: Not enough input arguments.
That error could be thrown if ‘obsData’ is a variable that should be passed to your ‘CalcMKJointProb’ function as an argument, a...

4日 前 | 1

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Need to make a 4D plot(3D + Colour)
The simplest option is likely the scatter3 function. plot it as: figure scatter3(x, y, z, [], t, 'filled') grid on axis e...

4日 前 | 0

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Curve fitting for coupled monod equation
There are several options. Two are linked to here. One option: Parameter Estimation for a System of Differential Equations u...

4日 前 | 0

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