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J Chen


Last seen: 8 days ago
101 total contributions since 2019

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Contributions in
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Answered
Contact Forces/Torques for Robotics Applications
The Spatial Contact Force Block will automatically apply the forces to the elements connected to its two ports. You don't need t...

10 days ago | 0

Answered
3D matrix with equation
does mean ? You can calculate the result using three loops on i, j, and l.

10 days ago | 0

Answered
How to interpolate when we have two different sizes
temps_B and B have different size. They need to be the same size.

10 days ago | 0

Question


Separate Simulink block name into several lines
How can I separate the name of a Simulink block into serveral lines in R2020b? The Retuen key doesn't seem to work in this new r...

1 month ago | 1 answer | 0

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answer

Answered
How can I get the value by choosing 't' and 'x'? ,How should I set the graph range?
Move the plot command outside the loop. Store the calculation at each time step in a buffer. For example: hist = nan(n,length(t...

1 month ago | 0

Answered
Log simulink (variable step) data with with one sample time!
Uee the To Workspace block in the Simulink Sink category and specify the Sample time in the block parameters.

1 month ago | 1

Question


Dispaly numbers in Simscape Mechanics Explorer or Simulink 3D animation viewer
How can I dispaly numbers in a Simscape Mechanics Explorer? The numbers need to be displayed in the Mechanics Explorer in order ...

2 months ago | 0 answers | 0

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answers

Answered
I can't plot this 3D matrix despite looking at other examples
The matrix has 3 independent variables. 3D plots using surf can only have 2 independent variable. You need to general 4 3D figur...

2 months ago | 0

Answered
If loop with character and two conditions
Use strcmp(t_adf_fdiff.reject,t_kpss_fdiff.reject) insteafd of t_adf_fdiff.reject == t_kpss_fdiff.reject. The two if statemen...

2 months ago | 0

Answered
How can I print the heatmap as grayscale?
heatmap(A) colormap(gray)

2 months ago | 1

| accepted

Answered
solving equations with trigonometric functions
format long % show more digits double(S1.theta3) double(S1.theta4) format % back to the default format

2 months ago | 0

Answered
How can I apply the same force on multiple objects in Simscape Mulitbody?
The problem is not with the force block. The problem is caused by incorrect configuration of the components, i.e., the component...

2 months ago | 0

Answered
specialist/gig help
Try Upwork.com or freelancer.com

2 months ago | 0

Question


Split Simulink 3D viewer into multiple panes
Is it possible to split the Simulink 3D Viewer into multiple panes? I can split the display pane of the 3D World Editor into mul...

2 months ago | 0 answers | 0

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answers

Question


How to add a ROUTE node in the 3D world?
How can I add a ROUTE node in the 3D world as hilighted in the screen shot? Thanks.

2 months ago | 0 answers | 0

0

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Answered
I have a . Mat file of battery model how can i create simulink model from it
Mat file contain variables and their values. You can load it to the workspace. The file most likely contains test data. You need...

3 months ago | 0

| accepted

Answered
Unable to find base block in simscape multibody
What do you mean by Base Block? You can find a World Frame block in the Frames and Transforms sub-category. The "Base Block" may...

3 months ago | 0

Answered
How can i obtain the final value of x and y?
Use sol = solve(prob) to solve the problem. The answer is in the sol object. You can also use sol.x and sol.y. Note that you may...

3 months ago | 0

| accepted

Answered
White background from "Print to Figure" in Simulink scope
I found that the background color is same as the scope for the figure generated from the "Print to Figure" command in the scope ...

4 months ago | 0

| accepted

Question


White background from "Print to Figure" in Simulink scope
The "Print to Figure" menu command in a Simulink scope generates a figure with a black background. How can I change the backgrou...

4 months ago | 1 answer | 0

1

answer

Answered
Replacing a for loop with matrix multiplication
Try x'*inv(SIG)*x. Matlab can directly handle vectors and matrices.

4 months ago | 0

Answered
CONVERTING MATLAB SIMULINK MODEL INTO Programming
Try the Simulink coder.

4 months ago | 0

Answered
How do I store data that meet conditions of an if statement
You over wrote the variable data. One soluation is to change data to data(i).

4 months ago | 0

Answered
Impedance versus frequency plot in Simscape Simulink
Bode plot is the gain and phase of the impedance. Gain is the magnitude. Phase is the angle. You can use the magnitude and angle...

5 months ago | 0

Question


Simulink Pixhawk Support Package System Requirements
What is the MINIMUM system requirement to generate code from Simulink and download to a Pixhwak in R2020b? Will I be able to jus...

5 months ago | 2 answers | 0

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answers

Submitted


Euler angles to axis-angle vector conversion for Simulink 3D
Calculate the corresponding axis-angle vector for given Euler angles

5 months ago | 2 downloads |

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Answered
How can I convert a double variable to uint8 and convert it back to double?
Very interesting. In R2019b, I got >> d = 163.0 d = 163 >> d == double(uint8(d)) ans = logical 1 >> d == (uint8(...

5 months ago | 0

Answered
how to use a revolute joint to rotate a body around it's local frame x axis not the global frame
Insert a rigid transform between the revolute joint and the object. Align the z-axis of the joint to the x-axis of the object (e...

5 months ago | 1

Answered
Spectrum Analyzer continuous issue
The spectrum analyzer requires discrete input and the frerquency span needs to be adjusted according to the sampling period. The...

5 months ago | 0

Answered
How does SFRotation works in Simulink 3D world Editor?
Simulink 3D rotation input use axis-angle (x, y, z, angle) format, where the first 3 elements specify the axis direction. Euler ...

6 months ago | 0

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