How can I simultaneously solve for these equations?
If you have the symbolic toolbox, a straight forward approach works, although it takes some time ... % ODE propblem syms B...

1年以上 前 | 0

Error when using ode15
It is good practice to try and avoid globals, but rather pass them as auxilary variables into the function. Fao = 1487.351; % ...

1年以上 前 | 0

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Plotting Step Response of a Differential Equation
You are close to a viable solution. Solve for an analytical solution, then make it a Matlab (anonymous) function with matlabFunc...

1年以上 前 | 0

Runge-Kutta 4th order method
First up, you will need a much smaller step size to get an accurate solution using this explicit RK4 (with no error control). I ...

1年以上 前 | 0

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How to draw Fig. 1 from the attached pdf with this code
I didn't bother draw the other 3 lines, but you just ned to make the necessary changes to gamma for that. If you run somethi...

1年以上 前 | 0

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fsurf not drawing cant explain
Do you really need to use the symbolic toolbox? Why not just plot a numerical surface? But you are right, your numbers are widel...

1年以上 前 | 0

Fitting Monod Equation with ODE45 to data using lsqcurvefit function
Here's my solution. First set up the measured data, plot it, and look to see that it is all OK. t = [0 3 5 8 9.5 11.5 14 16 ...

1年以上 前 | 0

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Solve integrals with Matlab
Do you have the symbolic toolbox? If so, start with the int command. You can do both indefinite and definite integration. sy...

1年以上 前 | 1

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MATLAB Help - Rolling Dice Simulation / Central Limit Theorem
A quick hack using randi and cumsum is N = 100 x = randi(6,N,6); cs = cumsum(x')'; for i=1:6 subplot(3,2,i) histogram...

1年以上 前 | 0

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How to calculate the accumulated rainfall value of 1, 2, 3, 4, 5, 6 and 7 days.
Here is my solution: I notice that you've got few NaNs for about a year and a half. Your last year is also incomplete. I is...

1年以上 前 | 0

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plot x axis as persentage
Below, I've plotted an arbitrary function between arbitrary limits, -5 and +37. %% x = linspace(-5,37)'; y = erf(x/20); ...

1年以上 前 | 0

inline function error help(tanh)
I can, but perhaps you should use anonymous functions. The inline approach is now discouraged. Instead of what you wrote above...

1年以上 前 | 0

how to plot multiple waves on one surface
Here is a mock up solution. Code is: below. I've used part of your data, but I've made up some similar data (using a sinc fun...

1年以上 前 | 0

LaTex with 2 strings separated by a num2str
Use an escape (backslash) for the % errordisplay=[' $\varepsilon_{RTP}=$ ',num2str(rtep),'\%'];

1年以上 前 | 1

Solving second order implicit differential equation
Just convert the 2nd order ODE into Cauchy form. You will of course need 2 initial condtions. Define x, now you original equat...

1年以上 前 | 0

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Stimulating Chemical Reaction with Differential Equation on Simulink
Homework? Anyway, to get you started, take a look at my Simulink layout: I've painted the integrators yellow, and I have expli...

1年以上 前 | 0

how do i rotate an airfoil points? and plot.

1年以上 前 | 2

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plotting an exponential will a matrix over time
OK, your question is a bit vauge, and there are missing bits, i.e. the start point for y. I'm assuming you are trying to solve...

1年以上 前 | 0

finding lengths of an ellipse
If you need a little more help, then it pays to plot the ellipse and look at the arc lengths. t = linspace(0,2*pi)'; x = @(t)...

1年以上 前 | 0

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I want to know how i can apply k-means clustering on my scatter plotted dataset.
You probably want to use kmeans. Since you didn't give us any data to workj with, nor did you give us any idea of the number o...

1年以上 前 | 1

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Fitting model to titration data
For one thing, you don't assign an answer to function sseval. That's not going to help things. Here's my solution: I've re...

1年以上 前 | 1

Position of two subplots with bar charts
One option is to obtain the position of the plot with the long legend, and then re-size the other to the same width. But it's pr...

1年以上 前 | 1

Histogram x axis tick labels – string
Try >> get(gca,'XTicklabel') and hack that.

1年以上 前 | 1

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Histogram x axis tick labels – string
Released 2016b. What's your version? >> which xticklabels C:\Program Files\MATLAB\R2018b\toolbox\matlab\graph3d\xticklabels.m...

1年以上 前 | 0

Histogram x axis tick labels – string
Hack the final xticklabel x = randn(1e5,1); x= x-min(x)+1; histogram(log(x)) xlim([0,3]) xt = xticklabels; xt{end} = 'oth...

1年以上 前 | 1

solving a very complicated equation implicitly
A quick answer is you probably need to dot-divide (./) the term with the (vector) rpf. 2nd point. Because I used a root finder...

1年以上 前 | 0

Y-axis labels overlaps with figure when using a reversed x-axis
Ah, missed that. Nasty bug/feature. text(10,10.5e9,'x10^9') % place manually ?

1年以上 前 | 0

Y-axis labels overlaps with figure when using a reversed x-axis
Yes, it seems to only happen when there is an exponent in the y-axis. And even then the exponent must have double figures. Also ...

1年以上 前 | 0

solving a very complicated equation implicitly
OK, try this: My approach was to embed an integral inside a root solver. I basically used your code and coefficients, but chan...

1年以上 前 | 1

How can I find the coefficients of a second order ODE using data points?
You will also need to have collected x(t) at each sample point.

1年以上 前 | 0