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Aquatris


Last seen: 18 days ago |  Active since 2023

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Answered
Hello everyone, how can use matpower with the online matlab?
You upload the matpower.m to your matlab drive and work like that.

23 days ago | 0

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Answered
6x6 system of multivariate quadratic equations ... non-negative real solutions
fsolve seems to work for most cases, if not lsqnonlin is also an option. here is a general explanation

23 days ago | 1

Answered
How can i define xo or intial parameters that the ga begin with ?
You use InitialPopulationMatrix of optimoptions. You can get more info on what options you can set for ga in here under InputArg...

24 days ago | 0

Answered
finding relation between two variables, being discharge and water level in a river
Here is another way using unconstarint optimization: % define some parameters c_real = 3.2965;% actual c value in q = h^c h_m...

25 days ago | 0

Answered
Configure model block in simscape
In simulink you can create masked systems with parameters and attach a callback to those parameters. So in the callback you can ...

1 month ago | 1

Answered
Unable to connect scope wit circuit output
You need to put a block for what you want to measure at that point, you can use voltage sensor block to measure the voltage and ...

1 month ago | 0

Answered
How to create a state space model with constant term and do feedback.
You can define which inputs and outputs are connected to your controller. Checkout the feedback function page and look at the 'S...

1 month ago | 0

Answered
How to merge two tables into a single table?
You can add "Source" header to each table with "Table 1" or "Table 2" inputs and join them like joining arrays; table1 = table(...

1 month ago | 1

Answered
Conditionally stop simulation in simulink
You can use the stop simulation block.

1 month ago | 0

Answered
function zpk and linmod
Here explains how it is done. Basically you have your function that describes the relation between states and inputs. If they ar...

1 month ago | 0

Answered
How to calculate Average without receiving 'Inf' as a result.
Here is one way: % create dummy matrix A = rand(100,1); A([5 10 24 55 23 60]) = inf; A([12 56 29 35]) = nan; mean(A) % s...

2 months ago | 0

Answered
writematrix: how to get formatted txt-output?
Use 'tab' delimiter option instead of single space. M = [100 0 4500;0 1 38.29;1 1 38.22]; writematrix(round(M,2),'file.txt',...

2 months ago | 0

Answered
Simulate recursive function in simulink
I did not care about the dimensions at all while creating the simulink model so some adjustment might be necessary but this is o...

2 months ago | 0

Answered
Add NaN in the first row of a table
Assuming all your entries are numeric, since you want to assign NaN, here is one way; % create dummy table Age = [38;43;38;40;...

2 months ago | 0

Answered
Error in displaying the whole matrix
Ther eis probably a 1e6 at the top of the display. You can do 'format bank' to mitigate this if you want or any other format opt...

3 months ago | 0

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Answered
How to update a function with output from another function?
Here is one way iff the required variables are within the state vector 'y', then you can do: %% change ode45 call [t, y] = ode...

3 months ago | 0

Answered
slow drawing of a set of points on a plane
In essence for loop are always slower. So try to vectorize your code whereever possible for efficiency, here is a good read. In ...

3 months ago | 0

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Answered
plot magnitude data at location (x,y,z)
Here is one way where you use colors to indicate the magnitude; % random data x = [0:pi/50:10*pi nan]; % nan is added to remov...

3 months ago | 0

Answered
Generate the motion (Trajectory) of a sphere (or point) with given velocity value
If you dont care about the actual timing and things, here is one way where the colors of the path indicate the speed and a simpl...

3 months ago | 0

Answered
How to generate vector with non-linear spacing?
The answer from another question here: A = 1; B = 5; std = .9; % need to play with this to get desired shape within desired r...

3 months ago | 0

Answered
Second Order Laplace solving doesn't work ('Unable to find explicit solution')
Not sure the underlying reason behind it but you are defining the X as a function of s and solve function seems to be having tro...

3 months ago | 0

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Answered
How do I solve system of differentials using ode45 and eom functions
You defined a symbolic variable within your ode function, which is a nono if you wanna solve it numerically :D function ds = e...

4 months ago | 1

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Answered
Solving with ode45 with a solution dependant variable in the ode
No, you should not do it that way. Instead you should create your function properly in a way that represents the equations. It w...

4 months ago | 0

Answered
How to display a color bar in Matlab as shown below
You can call the colorbar function with the desired tick values Z = peaks; contourf(Z) colorbar('ticks',[-6:0.5:8])

4 months ago | 1

Answered
Error in for loop: Index exceeds matrix dimensions.
You have essentially made two mistakes: matrix_f only has 6 rows. You setup up your for loop such that k is 1 2 3 4 5 6 . When ...

4 months ago | 0

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Answered
Friend Function implementation in MATLAB
You can use the Access List property. Here is more explanation. Here also.

4 months ago | 0

Answered
how to do rising and falling edge in single signal using signal builder..?
Click on Signal->ReplaceWith or New->Square and play with the points. Alternatively, click on Signal->Custom-> enter your time...

4 months ago | 1

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Answered
how to make task in simulink
You can specify sample time of each block seperatly. Here is more information and how to do it for different blocks, subsystems ...

4 months ago | 0

Answered
How to loop through cell array and apply script to each double?
You can use the cellfun function, where you use your script as the function. Example: a = {1:3, 200:205, 10:12}; new_a = cell...

4 months ago | 0

Solved


Find MPG of Lightest Cars
The file cars.mat contains a table named cars with variables Model, MPG, Horsepower, Weight, and Acceleration for several classi...

4 months ago

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