Jim Riggs
Missile Defense Agency - Advanced Technology Group
Followers: 0 Following: 0
Developing simulations for the Missile Defense Agency - Advanced Technology group. 30+ years experience in missiles, smart munitions and other aerodynamic systems.
Programming Languages:
Python, C++, C, MATLAB, Fortran
Python, C++, C, MATLAB, Fortran
Accept 5 answers given by other contributors
Awarded to Jim Riggs on 08 Apr 2023
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
Provide your first answer ever to someone else's question
Awarded to Jim Riggs on 07 Dec 2017
Feeds
提问
Can "Pause on Errors" be enabled by a script, or set as the default?
I run many processes that take a day or more to run, and sometimes they encounter unexpected errors. I don't always think to tu...
1 month 前 | 1 个回答 | 0
1
个回答提问
MATLAB coder has been running for a week
I started running the MATLAB coder to convert a function to a MEX function a week ago. (At this point, it has been running 166 ...
8 months 前 | 1 个回答 | 0
1
个回答已回答
How to increment a value every second with periodic resets to zero in Simulink?
Check out this discussion and see if it helps: Simulink counter block having an initial starting value of -1 - MATLAB Answers -...
How to increment a value every second with periodic resets to zero in Simulink?
Check out this discussion and see if it helps: Simulink counter block having an initial starting value of -1 - MATLAB Answers -...
8 months 前 | 0
提问
MEX -setup does not see my compiler
I am running R2017a and have a working installation of MS Visual Studio with Visual C++ 2019 on my system. The MATLAB command ...
1 year 前 | 1 个回答 | 0
1
个回答提问
How to interpret tocBytes results
I am currently running on R2019b, but when I attempt to start parpool using the 'threads' option, it tells me that 'threads' is ...
1 year 前 | 1 个回答 | 0
1
个回答已回答
How to check if my current license support the State flow toolbox?
The 'ver' command shows all of the toolboxes which are available under the current MATLAB license, but this does not not mean th...
How to check if my current license support the State flow toolbox?
The 'ver' command shows all of the toolboxes which are available under the current MATLAB license, but this does not not mean th...
1 year 前 | 0
已回答
Confusion with tic-toc and run times
You might consider commenting out the "tic" command inside the for loop. This will make all of the "times" values relative to ...
Confusion with tic-toc and run times
You might consider commenting out the "tic" command inside the for loop. This will make all of the "times" values relative to ...
1 year 前 | 1
| 已接受
已回答
Get current simulation step (or time) in Simulink
It looks like what you want is a simple counter. Try this: You don't need to use a time generator and a multiply (and floor)...
Get current simulation step (or time) in Simulink
It looks like what you want is a simple counter. Try this: You don't need to use a time generator and a multiply (and floor)...
1 year 前 | 1
提问
'String scalar or character vector must have valid interpreter syntax' in waitbar
I am creating a waitbar where the text includes the path to the file being processed. The path name, ovbiously includes a backs...
1 year 前 | 2 个回答 | 0
2
个回答已回答
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...
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 years 前 | 0
已回答
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...
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...
2 years 前 | 0
已回答
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...
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...
2 years 前 | 0
已回答
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...
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 years 前 | 1
| 已接受
已回答
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...
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 years 前 | 0
| 已接受
已回答
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 % ... ...
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 % ... ...
2 years 前 | 0
已回答
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...
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...
2 years 前 | 0
已回答
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...
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...
2 years 前 | 0
已回答
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])...
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])...
2 years 前 | 0
| 已接受
已回答
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...
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...
2 years 前 | 0
已回答
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'], ...
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'], ...
2 years 前 | 0
| 已接受
已回答
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...
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...
2 years 前 | 0
已回答
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...
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...
2 years 前 | 0
已回答
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...
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...
2 years 前 | 0
已回答
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);
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);
2 years 前 | 0
已回答
Transformation matrix between two cartesian systems
Coordinate rotation (or transformation) involves expressing the coordinates of a point defined in one reference frame in terms ...
Transformation matrix between two cartesian systems
Coordinate rotation (or transformation) involves expressing the coordinates of a point defined in one reference frame in terms ...
2 years 前 | 2
| 已接受
已回答
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...
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...
2 years 前 | 0
| 已接受
已回答
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...
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...
2 years 前 | 2
已回答
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...
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...
2 years 前 | 0
| 已接受
您也可以从以下列表中选择网站：
美洲
- América Latina (Español)
- Canada (English)
- United States (English)
欧洲
- 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)
亚太
- Australia (English)
- India (English)
- New Zealand (English)
- 中国
- 日本Japanese (日本語)
- 한국Korean (한국어)