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Question
timerange subscript within a timetable
End goal: timeTableTT14to22 = timeTableTT(hours(14) <= timeofday(timeTableTT.Date) & timeofday(timeTableTT.Date) <= hours(22), ...
4 dagar ago | 0 answers | 0
0
answersQuestion
using a MATLABEngine obj to dynamically construct a timetable with dates "yyyy-MM-dd" as keys and multiple double value columns
Hi Experts, 1) Looking for a best practice/way to dynamically build a timetable (through a for loop that would add multiple lin...
14 dagar ago | 0 answers | 0
0
answersQuestion
NuGet - mathworks.prodserver.dotnetclient library
Hi All, Curious to understand if any of you are using: https://www.nuget.org/packages/mathworks.prodserver.dotnetclient/2023....
15 dagar ago | 0 answers | 0
0
answersQuestion
backtestStrategy: rebalance function keeps track of past & current open position
Hi All, backtestStrategy provides a great workflow for defining a strategy, which includes the rebalancing function. As part ...
25 dagar ago | 1 answer | 0
1
answerQuestion
call Matlab code from c# / .NET threads: multi-thread scalability: is MathWorks.MATLAB.Engine best option?
Hi Experts, Typically NET & Matlab synergies is a common topic of interest. Having said that, just simply calling a function h...
ungefär en månad ago | 1 answer | 0
1
answerQuestion
excel-like formula column
matrix of two columns representing in the morning and in the day. can we have a 3rd column that would compute the average of f...
4 månader ago | 1 answer | 0
1
answerQuestion
Index a Y = MxN, with X=Mx5 (where elements in X are column IDs for values to extract from Y)
Having a Y = MxN matrix of data, and a X = Mx5 (or other fixed nr. < than N) matrix obtained as: [~, X] = maxk(Z,5,2); % where ...
4 månader ago | 1 answer | 0
1
answerriskfolio-lib / PyPortfolioOpt like functionality
thanks @Steven Lord! Let's get deeper into it then: Riskfolio-lib: https://riskfolio-lib.readthedocs.io/en/latest/index.html ...
ungefär ett år ago | 0
Question
riskfolio-lib / PyPortfolioOpt like functionality
Hi All, Is there any functionality equivalent to python's riskfolio-lib/PyPortfolioOpt libraries, or what's the closest? than...
ungefär ett år ago | 2 answers | 0
2
answersQuestion
work with dxFeed data feed?
It would be great if someone presents an example of working with dxFeed datafeed.
mer än ett år ago | 0 answers | 0
0
answersQuestion
rowfun (or other function?) to access multiple rows in a table (as in current + previous 5 rows)
Following the excel typical example, where a new column can be a formula accessing current row + values in row(s) above / below ...
mer än 3 år ago | 0 answers | 0
0
answersError in ibtws connecting (Trading Toolbox)
Guys, one question ... Why do you still have Interactive Brokers as a supported broker and data source in the DOCs ... if it ...
nästan 4 år ago | 0
How to fix a simple callback function with a tcpip object?
Should we specify a function: function dispcallback(obj,event) callbackTime = datestr(datenum(event.Data.AbsTime)); f...
ungefär 4 år ago | 0
Question
can a struct function access struct elements ?
myStruct.va1 = 1 myStruct.val2 = 2 myStruct.mySum = @(x,y) x + y nonetheless, x & y are specific inputs into the function. ...
ungefär 4 år ago | 1 answer | 0
1
answerQuestion
dynamic java path vs static java path
So, docs say one can add file javaclasspath.txt under the 'prefdir' folder, and its contents are loaded statically upon Matlab's...
ungefär 4 år ago | 1 answer | 0
1
answerQuestion
declare global var by string name
within a function: function DoSomeWork(globalVarName, var2, var3, etc) global globalvarName ??? // so something with gl...
ungefär 4 år ago | 1 answer | 0
1
answerQuestion
converting a table (having as first col a datetime col) col into a datetime (having both date & time in its composition)
Oftentimes a datetable has 2 adjacent columns: a datetime with a date and a string with a time. If one wants to concatenate the...
mer än 4 år ago | 1 answer | 0
1
answerQuestion
state machine programming - helper tools
Hi, Are there any predefined classes/objects/functions/docs to make state machines in matlab easier to develop? thanks
mer än 4 år ago | 1 answer | 0
1
answerField List of IQFeed Realtime Data
Matlab doesn't have a robust IQFeed library ... multiple cases opened, with a couple of conclusions: 1) IQFeed might sporadic...
nästan 5 år ago | 0
Question
programming generic state machines (that would handle a custom data science App): regular .m code vs Simulink / Stateflow?
Usually, one would use Simulink/Stateflow for HDL/Bio/Automotive/Embedded-FPGA/C++/etc. scope ... which a highly focused applic...
nästan 5 år ago | 0 answers | 0
0
answersQuestion
can I increase maximum possible array used memory?
I get: >> memory Maximum possible array: 6209 MB (6.510e+09 bytes) * Memory available for all arrays: 6...
mer än 5 år ago | 1 answer | 0
1
answernchoosek with range of k values and ordered sequential value sets
A modified version of an nchoosek sub-function might do the trick: function P = combsCont(v,m) %COMBS All possible comb...
mer än 5 år ago | 0
| accepted
Question
nchoosek with range of k values and ordered sequential value sets
The below: function cnkMatAll = NChooseKRange(nVect, kRange) % NChooseKRange % % Combinations of N taken as k ...
mer än 5 år ago | 1 answer | 0
1
answeris there an alternative to nchoosek which is too slow?
not if some sort of (in-memory?) compression is applied ... if that's even possible. but looking at the brutal return of say n...
mer än 5 år ago | 0
Question
how can we estimate memory requirements for nchoosek?
nchoosek is a memory intensive command ... to the point it can easily kneel down your system ... or get something back as the be...
mer än 5 år ago | 1 answer | 0
1
answerQuestion
is there an alternative to nchoosek which is too slow?
Try cnk = nchoosek(1:40, 10) and you'll see how slow it is. Is there an alternative? Thanks
mer än 5 år ago | 2 answers | 0
2
answersReplace NaN's in table with zero
so, in other words: mainTTable{:,:}(ismissing(mainTTable)) = 0;
mer än 5 år ago | 0
having a 2 months timetable with 10 minute data points, is it possible to extract first half of each day using subscripting?
that's the Pandas equivalent: https://stackoverflow.com/questions/19179214/selecting-data-between-specific-hours-in-a-pandas-...
nästan 6 år ago | 0
Question
having a 2 months timetable with 10 minute data points, is it possible to extract first half of each day using subscripting?
having a timetable, one can do sub-scripting once on the hole interval. can one take a sub-script of the daily data of such a ...
nästan 6 år ago | 2 answers | 0
2
answersQuestion
Classification Learner App - generate a more generic function for your model training that could take varying size of prediction tables? One step beyond the default function generation
This is a question with an answer, that could easily translate into a feature implementation. When one generates a function fro...
nästan 6 år ago | 1 answer | 0