Abdolkarim Mohammadi-Balani

Last seen: Today

178 total contributions since 2019

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Answered
Z must be a matrix, not scalar or vector - surface plot
You use surf when you have z value for each combination of x and y vectors. Here, you have x, y, and z vectors, so you should dr...

16 hours ago | 0

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Hi everyone, How do I call functions in simevents for selected queues to halt entities blocking them from departing whenever entities with specific attributes are injected into the system (by a deliberate event).
I think you must implement this complex system with MATLAB Discrete-Event System (MDES) only, since you need to iterate over que...

10 days ago | 0

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How do you model transfer batching in simevents if you use orders as entities and order quantity as an attribute?
You should use an Entity replicator block, which replicates entities based on the order size. Replicas are production batches af...

12 days ago | 0

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How can I bring 5 variable at 5 different axis angles and plot the correlation coefficient with respect to a base variable.
MATLAB does not have built-in spider plot, AFAIK. The nearest built-in is polarhistogram(). https://www.mathworks.com/help/matl...

17 days ago | 0

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Plot of 4 variables with dates(years)
You should read the documentation of plot(): https://www.mathworks.com/help/matlab/ref/plot.html All you need is to define c...

19 days ago | 0

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Question

Loading timeseries data into the deep network designer
I have read and learnt how to train a deep network for forecasting future values of a timeseries here: https://www.mathworks.c...

22 days ago | 0 answers | 0

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Using for loop to extract data from a matrix
The break statement terminates the for loop: if j > numel(cavity) break end

26 days ago | 0

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PSO algorithm pv system code
You should formulate your problem based on the scientific literature. MATLAB has built-in PSO, but it only handles unconstrained...

26 days ago | 0

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Calculate trends with regression for columns in MATLAB
You can use parfor (parallel for loop) instead of for. The more CPU cores you have, the more speed you gain. https://www.mathw...

26 days ago | 0

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Creating a function with varying numbers of input parameters
You should use Variable-length input argument list using varargin(). https://www.mathworks.com/help/matlab/ref/varargin.html

30 days ago | 1

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Why SimEvents spends so much time
You should run 1000 simulations using sim() in conjunction with SimulationInput objects. With SimulationInput you can define the...

1 month ago | 0

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link a custom creation function
1) "If you have a partial initial population, meaning fewer than PopulationSize rows, then the genetic algorithm calls CreationF...

1 month ago | 0

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What information is conveyed by the different colors in Matlab's contourf( ) data plots?
You can turn on the ShowText property of the contour, or add the color bar: x = linspace (-5, 5, 51); y = linspace (-5, 5, 51...

1 month ago | 0

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Answered
MATLAB function block error in Simulink
Unlike m-file functions, MATLAB function block does not apply automatic array expansion. The simplest way to overcome is to defi...

1 month ago | 0

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Run a Simulink modell stepwise inside Matlab
You can use MATLAB function block. It is executed on every timestep just like other blocks, and you can return outputs for every...

1 month ago | 0

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Create 9x9 matrix with RANDI between [0,2] with each 0,1, and 2 repeating three times each per column.
You can first create a vector with the values you need: Reference = repelem (0:2,3)'; Then you initialize the 9x9 matrix with...

1 month ago | 1

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How can I display the last value obtained in a scope block graph in Simulink?
The Display block shows the numeric output. https://www.mathworks.com/help/simulink/slref/display.html

1 month ago | 0

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Can I use my own timetraces in M/M/1 queue implementation by Simevents?
I think you need a simple M/M/c queue. The example you are trying has components for other purposes, which might have confused y...

1 month ago | 0

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Answered
What am I doing wrong?
For drawing multiple line plots at once, you should have one column vector for each line. You just need to have x as a column ve...

1 month ago | 2

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How to use the Parallel Computing Toolbox of MATLAB to optimize the parameters of a Simulink model with genetic algorithm?
You should set ga() to pass all of the generation members at once using UseVectorized option. Then you set the objective functio...

1 month ago | 0

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How to solve this problem? Error using == Quadratic constraints not supported
QP = Quadradic Programming = Quadradic objective function and linear constraints. QCQP = Quadratically Constrained Quadratic P...

1 month ago | 2

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Answered
Small Value bars are missing in bar graph.
You can add a constant to the bars with small values. For example: X (X<4) = X (X<4) + 0.2;

1 month ago | 0

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parsim() with fast restart returns different results
I am running multiple simulations using parsim() with fast restart to accelerate execution. However, I have noticed that using p...

1 month ago | 1 answer | 0

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How do you use the NaN function?
You first create the NaN vector using nan(), then fill in the elements. V = nan (500,1); V (124:end) = Data;

1 month ago | 0

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How to plot one point in one axis
You should turn off the visibility of the vertical axis. For example: scatter (1,1); ax = gca; ax.YAxis.Visible = 'off'; xl...

2 months ago | 0

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How to assign array values to object.object.property at once using deal?
I know that it is possible to assign the values of an array to object.property using deal(). Is it possible to do such thing for...

2 months ago | 1 answer | 0

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How to import excel file only one sheet and skip first column?
You should use readmatrix(). For example: M = readmatrix (filename, 'Sheet', 'MySheet', 'Range','B2:Z10'); Readmatrix documen...

2 months ago | 0

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How to make a burst entity generation based on a event
You should use MATLAB Discrete-Event System block instead of an event-based Entity Generator.

2 months ago | 0

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Do Simevents Entity Servers release entities in a FIFO manner?
Generally, the server starts to serve an entity as soon as the entity enters the block. The server tries to forward the entity a...

2 months ago | 0

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Answered
scaling and change the ylim for subplot
You should set ylim() for each axes separately. For example: x = linspace (0, 6, 51)'; y1 = sin (x); y2 = cos (x); yyaxis...

2 months ago | 0

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