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Andy


Last seen: 6 Monate ago Active since 2017

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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 ...

11 Monate ago | 0 answers | 0

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answers

Answered
Error 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 ...

mehr als ein Jahr ago | 0

Answered
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...

mehr als ein Jahr 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. ...

mehr als ein Jahr ago | 1 answer | 0

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answer

Question


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...

mehr als ein Jahr ago | 1 answer | 0

1

answer

Question


declare global var by string name
within a function: function DoSomeWork(globalVarName, var2, var3, etc) global globalvarName ??? // so something with gl...

mehr als ein Jahr ago | 1 answer | 0

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answer

Question


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...

etwa 2 Jahre ago | 1 answer | 0

1

answer

Question


state machine programming - helper tools
Hi, Are there any predefined classes/objects/functions/docs to make state machines in matlab easier to develop? thanks

etwa 2 Jahre ago | 0 answers | 0

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Answered
Field 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...

mehr als 2 Jahre 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...

mehr als 2 Jahre ago | 0 answers | 0

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answers

Question


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...

etwa 3 Jahre ago | 1 answer | 0

1

answer

Answered
nchoosek 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...

etwa 3 Jahre ago | 0

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 ...

etwa 3 Jahre ago | 1 answer | 0

1

answer

Answered
is 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...

etwa 3 Jahre 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...

etwa 3 Jahre ago | 1 answer | 0

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answer

Question


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

etwa 3 Jahre ago | 2 answers | 0

2

answers

Answered
Replace NaN's in table with zero
so, in other words: mainTTable{:,:}(ismissing(mainTTable)) = 0;

etwa 3 Jahre ago | 0

Answered
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-...

mehr als 3 Jahre 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 ...

mehr als 3 Jahre ago | 2 answers | 0

2

answers

Question


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...

mehr als 3 Jahre ago | 1 answer | 0

1

answer

Question


function to import varying size text file automatically ? - one step beyond the Import Data Wizard
Hello, The Import Data Wizard is a great little tool to use on one file, say "Customers_1.txt" ... then the user gets present...

mehr als 3 Jahre ago | 0 answers | 0

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answers

Question


table / timetable - removing zero columns
My answer is: function pTable = aRemoveZeroTableColumns(primersTable) % % % pTable = primersTable; i...

mehr als 3 Jahre ago | 1 answer | 0

1

answer

Answered
Removing columns containing zeros
If you've got a table w/ various variable names that you want to keep, you might do: function pTable = aRemoveZeroTableColu...

mehr als 3 Jahre ago | 0

Question


Matlab Production Server: accessing environment/persistent variables on a matlab server
Use-case: Persistent & changing data (clients can change it during a call) across function calls made by clients towards a m...

mehr als 3 Jahre ago | 0 answers | 0

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answers

Question


Matlab prodution server mSq = client.CreateProxy<MagicSquare> Error: "Unable to cast object of type <XYZ>.ABC_Proxy to ABC"
The dot-net example of deploying a package on a production server and consuming a function are very useful. Nonetheless, there m...

mehr als 3 Jahre ago | 0 answers | 0

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answers

Question


cannot resolve dependency to assembly 'Google.ProtocolBuffers, Version 2.3.0.277, Culture=neutral, PublicKeyToken=17b... because it has not been preloaded.
Hi guys, Am trying to import the .NET assembly, path: C:\Program Files\MATLAB\MATLAB Production Server\R2018a\client\dotne...

mehr als 3 Jahre ago | 0 answers | 0

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answers

Answered
IQFeed: plot return from array of cells?
Right ... many issues with using the IQFeed API ... such as: 1) Examples from the DOCs not working: Trial>> timeseries(c,se...

mehr als 3 Jahre ago | 0

Question


IQFeed: plot return from array of cells?
Hi, Just testing the IQFeed API and glad to see some examples on the docs. However, I can see following: 1) goog = history(c...

mehr als 3 Jahre ago | 3 answers | 0

3

answers

Question


pandas reshaping and pivoting equivalent
What is the equivalent to Pandas reshaping & pivoting? It can be referenced at: <https://pandas.pydata.org/pandas-docs/stabl...

mehr als 3 Jahre ago | 0 answers | 0

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answers

Question


can a timetable column reference a function handle automatically and dynamically add current value based on a set of computations?
I know we can always add a new column referencing a function, such as: timeTable.Data = functionOf(timeTable.ExistingVar); ...

mehr als 3 Jahre ago | 0 answers | 0

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