Jim Riggs
Missile Defense Agency - Advanced Technology Group
Developing simulations for the Missile Defense Agency - Advanced Technology group. 30+ years experience in missiles, smart munitions and other aerodynamic systems.
Python, C++, C, MATLAB, Fortran
Statistics
RANG
166
of 273 391
RÉPUTATION
657
CONTRIBUTIONS
4 Questions
254 Réponses
ACCEPTATION DE VOS RÉPONSES
75.0%
VOTES REÇUS
137
RANG
of 18 457
RÉPUTATION
N/A
CLASSEMENT MOYEN
0.00
CONTRIBUTIONS
0 Fichier
TÉLÉCHARGEMENTS
0
ALL TIME TÉLÉCHARGEMENTS
0
CONTRIBUTIONS
0 Publications
CONTRIBUTIONS
0 Public Chaîne
CLASSEMENT MOYEN
CONTRIBUTIONS
0 Point fort
NOMBRE MOYEN DE LIKES
100 of your answers have been accepted
Awarded to Jim Riggs on 07 Dec 2022
Accept 2 answers given by other contributors
Awarded to Jim Riggs on 15 Feb 2022
Contribute at least one answer each month for 36 consecutive months
Awarded to Jim Riggs on 02 Dec 2020
Answer 3 questions that were unanswered for more than 30 days
Awarded to Jim Riggs on 06 Aug 2019
Solve a problem for the first time
Awarded to Jim Riggs on 07 Jul 2018
Accept 1 answer given by other contributors
Awarded to Jim Riggs on 02 Mar 2018
Provide your first answer ever to someone else's question
Awarded to Jim Riggs on 07 Dec 2017
Content Feed
Attempting to perform the Runge-Kutta-Fehlberg Algorithm
I found the error indicated below. Note that your notation makes your code much harder to verify because you have separated th...
2 jours il y a | 0
Simulation of UAV trajectory results in discontinuity in measurements
The discontinuities that you see in the trajectory data are, in fact, realistic, and correspond to command inputs. These happen...
5 jours il y a | 0
Error using plot Vectors must be the same length. [line 29 ERROR]
The two arguments to the 'plot' command must be the same size, e.g. 'liquidmoleFractionA' must have the same length as 'T'. A g...
13 jours il y a | 0
Seconds, minutes or hours for year-long SIMULINK simulation?
There is a great risk of somthing going wrong if you use anything other than seconds in a physics model, since, as you pointed o...
2 mois il y a | 1
| A accepté
How to initialise Goto variables used in enabled subsystems
You should not need to "initialize" the Goto variables. The "Goto / from" blocks are simply a way to connect a signal without s...
2 mois il y a | 0
| A accepté
I need help writing a function with one input and one output
The syntax for defining a function is: function steps_made_sucessfully = walk(commanded_steps) % insert your code here % ... ...
3 mois il y a | 0
Generate look angles between aircraft and satellite
I don't think that you will find this exact problem solution in the Aerospace toolbox, but it does contain some functions that y...
3 mois il y a | 0
Simulink generate input at begining of simulations
I am not sure that I understand your specific question (i.e. the implementation you are describing). The way it sounds to me, y...
3 mois il y a | 0
Not able to Understand Code for "Volume of Solid by Revolution"
[X,Y,Z] = cylinder(fx(xivals)-yr,100); Creates a set of 3D points that define a cylinder figure('Position',[700 200 560 420])...
3 mois il y a | 0
| A accepté
Why should I use operation blocks instead of a quicker function block in simulink?
You might want to check out this documentation on Comparison of Custom Block Functionality. It references some limitations on M...
3 mois il y a | 0
How to save a data in another folder?
I like to define a string defining the work folder; e.g. workfolder = 'C:/user/JR/projectName/' save([workfolder 's1.mat'], ...
3 mois il y a | 0
| A accepté
How to run a for loop one at a time with each button click?
At the end of your "for" loop, add a "while" loop that looks for the button value. if i < 3 (you don't want it to pause the l...
3 mois il y a | 0
How can I access both data and time from the running simulink model and use it in a particular program?
Simulink has a "to workspace" block which saves the time history of the model data to the Matlab workspace in a variable that yo...
3 mois il y a | 0
How to create a loop with unknown number of iterations?
What you are describing sounds like a "while" loop. You specify a logical condition which will terminate the loop i=0; condit...
3 mois il y a | 0
How can I plot two functions in the same graph?
Try this: fplot(@(x) cosh(x)); hold on fplot(@(x) 0.6671x^3-1.7921x^2+2.7580x-0.089);
3 mois il y a | 0
Transformation matrix between two cartesian systems
Coordinate rotation (or transformation) involves expressing the coordinates of a point defined in one reference frame in terms ...
3 mois il y a | 1
| A accepté
Issue with doing FM on SIMULINK
1) The error is generated because the integration block is a continuous block, and you have specified a discrete solver. Change...
3 mois il y a | 0
| A accepté
Constant block doesn't accept array
Yes, you can save the value to the workspace and reference it in a constant block. As @Paul points out, the label on the Goto b...
3 mois il y a | 1
How to add x and y variables to individual values after creating a heatmap.
You can modify the axis properties after creating the plot: ax = gca; % get the curent axis handle ax.XTickLabel = {'Jan','Fe...
3 mois il y a | 0
| A accepté
draw rod shape trajectory
You might want to give this a try: Plot3 Shaded Line
3 mois il y a | 0
How to change my Simulink Scope output at workspace from 1x1x284 double to 284x1 double.
Try using the "reshape" command. There is also a reshape block in Simulink.
3 mois il y a | 0
For-loop using only last iteration
Inside the loop C = zeros(1,10) + A; the function "zeros(1,10)" is assigning zeros to the entire C vector, then adding A. Als...
3 mois il y a | 0
How can i merge the signals from the sensors into 1 signal ?
The merge block is not used to combine signals - it is used to select one of two triggered signals. The two inputs are signals ...
3 mois il y a | 0
Output for Accelerator Model
I think there is a misunderstanding. The way I read it, if you use a large number of inport and outport blocks (at the root lev...
3 mois il y a | 0
| A accepté
What kind of numerical method is used for the inverse kinematic block at simulink?
Here is a link to the Matlab documentation: Inverse Kinematics Algorithms
4 mois il y a | 0
| A accepté
Hold a value indefinitely once a condition becomes true
Try This:
4 mois il y a | 0
| A accepté
Trying to plot array points on a graph.
You might also try this: [row,col] = size(AA); % AA is the data matrix figure; for ii=1:row for jj=1:col if ...
4 mois il y a | 0
How to connect the two signals in one signal in MATLAB Simulink? I mean first signal finishes second signal starts.
You description of the problem is confusing to me, bu the statement in the title "first signal finishes second signal starts" ...
environ 2 ans il y a | 0
Numerical Integration in Matlab
There seem to be two problems: 1) your function "fun" returns "NaN" at zero, so you cannot integrate starting from zero. You n...
environ 2 ans il y a | 0
| A accepté
You can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)
Asia Pacific
- Australia (English)
- India (English)
- New Zealand (English)
- 中国
- 日本Japanese (日本語)
- 한국Korean (한국어)