J. Alex Lee
Last seen: Today
236 2016 이후 총 참여 횟수
J. Alex Lee's 배지
Contribute at least one answer each month for 12 consecutive months
Awarded to J. Alex Lee on 02 Dec 2020
Answer 3 questions that were unanswered for more than 30 days
Awarded to J. Alex Lee on 30 Aug 2020
20 of your answers have been accepted
Awarded to J. Alex Lee on 27 Jan 2020
Publish your first comment or rating
Awarded to J. Alex Lee on 09 Oct 2019
Solve a problem for the first time
Awarded to J. Alex Lee on 13 Mar 2018
Accept 1 answer given by other contributors
Awarded to J. Alex Lee on 20 Jul 2017
Provide your first answer ever to someone else's question
Awarded to J. Alex Lee on 20 Jul 2017
답변 있음
How to solve a system of second order nonlinear differential equations with boundary conditions
This is a boundary value problem, so probably the most straightforward way is to use bvp4c or bvp5c if you want to solve numeric...
How to solve a system of second order nonlinear differential equations with boundary conditions
This is a boundary value problem, so probably the most straightforward way is to use bvp4c or bvp5c if you want to solve numeric...
1일 전 | 0
답변 있음
Backward and Central Difference
I guess the answer depends what you want to do with those finite difference approximations. If you want to use it in an algorith...
Backward and Central Difference
I guess the answer depends what you want to do with those finite difference approximations. If you want to use it in an algorith...
2일 전 | 0
| 수락됨
답변 있음
Save class object as struct
Look at this too: https://www.mathworks.com/help/matlab/matlab_oop/flexible-saveobj-and-loadobj-pattern.html I think it means w...
Save class object as struct
Look at this too: https://www.mathworks.com/help/matlab/matlab_oop/flexible-saveobj-and-loadobj-pattern.html I think it means w...
2일 전 | 1
답변 있음
Can't get string to datetime conversion to work
str = '2019-05-17T19:36:00'; fmt = 'yyyy-MM-dd HH:mm:ss'; b = strrep(str,'T',' '); disp(b); timestamp = datetime(b,'Inpu...
Can't get string to datetime conversion to work
str = '2019-05-17T19:36:00'; fmt = 'yyyy-MM-dd HH:mm:ss'; b = strrep(str,'T',' '); disp(b); timestamp = datetime(b,'Inpu...
2일 전 | 0
답변 있음
Auto Refresh in app designer.
in general for "auto refresh" you can use the timer object to schedule recurrent execution - disclaimer i have only played with ...
Auto Refresh in app designer.
in general for "auto refresh" you can use the timer object to schedule recurrent execution - disclaimer i have only played with ...
8일 전 | 0
답변 있음
Using Hessian for least squares problem
Now that the actual question is clarified as a coding question and not a math question, it seems these should help: https://www...
Using Hessian for least squares problem
Now that the actual question is clarified as a coding question and not a math question, it seems these should help: https://www...
8일 전 | 0
| 수락됨
답변 있음
Select rows in a given table according to 3 criteria
This is small enough you could generate the full list of combinations % generate all combinations alltriplets = nchoosek(1:7,3...
Select rows in a given table according to 3 criteria
This is small enough you could generate the full list of combinations % generate all combinations alltriplets = nchoosek(1:7,3...
8일 전 | 0
| 수락됨
답변 있음
Iterating array of chars and saving to table or cell
Try this, if your function actually returns strings as your output suggests (rather than a char array) result = strings(length(...
Iterating array of chars and saving to table or cell
Try this, if your function actually returns strings as your output suggests (rather than a char array) result = strings(length(...
8일 전 | 1
| 수락됨
답변 있음
Interpolate X-Y coordinates with variable velocity to specified sampling frequency
I don't think you need loops...so assume your data is called XYV, and according to how you describe, I guess the last velocity p...
Interpolate X-Y coordinates with variable velocity to specified sampling frequency
I don't think you need loops...so assume your data is called XYV, and according to how you describe, I guess the last velocity p...
10일 전 | 0
| 수락됨
답변 있음
How to interpolate between two adjacent points of time series data, if the difference between any two consecutive points is greater than 25 by using for loop?
If you just want the points to be "appear" roughly evenly distributed, you could consider spacing in the arc length (although yo...
How to interpolate between two adjacent points of time series data, if the difference between any two consecutive points is greater than 25 by using for loop?
If you just want the points to be "appear" roughly evenly distributed, you could consider spacing in the arc length (although yo...
16일 전 | 2
답변 있음
How to interpolate between two adjacent points of time series data, if the difference between any two consecutive points is greater than 25 by using for loop?
Here's [another approximate] way to do it that will only call spline once (could as well do it with gridded interpolant) The me...
How to interpolate between two adjacent points of time series data, if the difference between any two consecutive points is greater than 25 by using for loop?
Here's [another approximate] way to do it that will only call spline once (could as well do it with gridded interpolant) The me...
17일 전 | 2
답변 있음
Why won't cells populate via if-else statements?
The if statements are probably your problem...you are comparing a column vector with scalars, which off the top of my head I don...
Why won't cells populate via if-else statements?
The if statements are probably your problem...you are comparing a column vector with scalars, which off the top of my head I don...
24일 전 | 0
답변 있음
Grouping age data into 5 year bins
Interesting, this could be useful for me too! You can use "discretize" to bin the data. Below is a quick and dirty class to impl...
Grouping age data into 5 year bins
Interesting, this could be useful for me too! You can use "discretize" to bin the data. Below is a quick and dirty class to impl...
약 1달 전 | 0
답변 있음
How to vectorize the following code for matrix insertion?
There is a minor point in David's answer, which is that not all index collisions are taken care of in how the g matrix is constr...
How to vectorize the following code for matrix insertion?
There is a minor point in David's answer, which is that not all index collisions are taken care of in how the g matrix is constr...
약 1달 전 | 1
| 수락됨
답변 있음
How to rotate 3D matrix?
it looks like your segment A is parallel to the axis OA (trivial in y-direction), in which case it should be easy to first trans...
How to rotate 3D matrix?
it looks like your segment A is parallel to the axis OA (trivial in y-direction), in which case it should be easy to first trans...
약 1달 전 | 0
| 수락됨
답변 있음
1-D Temperature Gradient
your time and space point vectors are t = 0:0.005:50; % but this gives you 10,001 points, not 10,000...so you decide what you h...
1-D Temperature Gradient
your time and space point vectors are t = 0:0.005:50; % but this gives you 10,001 points, not 10,000...so you decide what you h...
약 1달 전 | 0
답변 있음
how to find the order of convergence
It sounds like you already implemented Newton's method, so just save all your residuals and plot [the log of norm] versus the pr...
how to find the order of convergence
It sounds like you already implemented Newton's method, so just save all your residuals and plot [the log of norm] versus the pr...
약 1달 전 | 0
답변 있음
Saving each vector of an ode45 vector solution in a matrix.
Use a cell array instead z = cell(1,20) for i=1:20 G=i/20 %Saving that iterates value of G [phi,y]=ode45(@(phi,y) od...
Saving each vector of an ode45 vector solution in a matrix.
Use a cell array instead z = cell(1,20) for i=1:20 G=i/20 %Saving that iterates value of G [phi,y]=ode45(@(phi,y) od...
약 2달 전 | 0
답변 있음
How can I generate values randomly from another existing vecor?
how about v1 = [122,34,20,5,21] v1a = [0,v1] N = numel(v1a) ridx = randi(N,size(v1)) v2 = v1a(ridx)
How can I generate values randomly from another existing vecor?
how about v1 = [122,34,20,5,21] v1a = [0,v1] N = numel(v1a) ridx = randi(N,size(v1)) v2 = v1a(ridx)
약 2달 전 | 1
| 수락됨
답변 있음
Probelm with web app server
@Martin Andersson, hope you have resolved this by now as it has been over a month, but if not, check your windows service accoun...
Probelm with web app server
@Martin Andersson, hope you have resolved this by now as it has been over a month, but if not, check your windows service accoun...
약 2달 전 | 0
답변 있음
How to find duplicate file names(same name but different folder address), and write those files in excel with their respective folder address?
Here's a way that doesn't require as many loops and calls to ismember % % uncomment to simulate the results of dir and test % ...
How to find duplicate file names(same name but different folder address), and write those files in excel with their respective folder address?
Here's a way that doesn't require as many loops and calls to ismember % % uncomment to simulate the results of dir and test % ...
2달 전 | 0
답변 있음
Get all allowed values of a class property
Ah, I should more fully embrace the validator mechanism. Here is a way by defining a custom validator, so in a way less hard-cod...
Get all allowed values of a class property
Ah, I should more fully embrace the validator mechanism. Here is a way by defining a custom validator, so in a way less hard-cod...
3달 전 | 2
답변 있음
web() and inputdlg() in App Designer
i think you can get around both limitations with some extra coding...never tried it, and just a thought, but... you could proba...
web() and inputdlg() in App Designer
i think you can get around both limitations with some extra coding...never tried it, and just a thought, but... you could proba...
4달 전 | 0
답변 있음
Want to connect 3D scattered data points with line
On way is to do it in a loop. After your code, hold on d = zeros(size(x)); % to hold distances from the first point for i =...
Want to connect 3D scattered data points with line
On way is to do it in a loop. After your code, hold on d = zeros(size(x)); % to hold distances from the first point for i =...
4달 전 | 1
답변 있음
Concentric Squares with matricies
Try looking into padarray (or arraypad I can't remember...). I think you can apply successively to achieve what you want
Concentric Squares with matricies
Try looking into padarray (or arraypad I can't remember...). I think you can apply successively to achieve what you want
4달 전 | 0
| 수락됨
답변 있음
Storing a loop index value in a dynamic array?
Without trying to get into the weeds of your need, did you know that "unique" can additionally output indices into each argument...
Storing a loop index value in a dynamic array?
Without trying to get into the weeds of your need, did you know that "unique" can additionally output indices into each argument...
4달 전 | 1
| 수락됨
답변 있음
Extract data from a timetable excluding an specific date
This should work. Most of these steps should be straightforward..."ismember" may have been the key tt_1 = timetable(datetime({'...
Extract data from a timetable excluding an specific date
This should work. Most of these steps should be straightforward..."ismember" may have been the key tt_1 = timetable(datetime({'...
4달 전 | 0
| 수락됨
답변 있음
Save plot as logical matrix array with same dimensions as original?
are you looking for imwrite()? or some combination of getframe(), frame2im(), and imwrite()?
Save plot as logical matrix array with same dimensions as original?
are you looking for imwrite()? or some combination of getframe(), frame2im(), and imwrite()?
4달 전 | 0
답변 있음
multiple isntances of custom ChartContainer in a figure
Oops, documentation says that the Parent of an instance of chartcontainer can only be one of Figure object (default) | Panel ob...
multiple isntances of custom ChartContainer in a figure
Oops, documentation says that the Parent of an instance of chartcontainer can only be one of Figure object (default) | Panel ob...
4달 전 | 0
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou 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)