How to collect a new variable each time a function runs and save it into an array
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
Allan Munro
il 30 Nov 2020
Commentato: Allan Munro
il 3 Dic 2020
Hi, I have a program that is collecting a variable each time it is run through the function (every minute) and it collects a variable called 'VWAP'.
How do I save this data so next time the function runs it will save the new value of the variable in an array so all the values can saved for analysis later?
I was looking at mlock, but I am not sure how to use that to build an array.
Any assistance even directional is appreciated. thanks
Allan
function processContracts(contracts, params)
datavwap = IQML('quotes','Symbol','ACB','Fields',{'Bid','Ask','Last','VWAP','time'});
end
2 Commenti
Rik
il 30 Nov 2020
A persistent variable would be a good start. You may also want to consider using a class.
Risposta accettata
Raynier Suresh
il 3 Dic 2020
This can be done by using either “Persistent” or “Global” variable.
Refer the below code:
function myFun(x)
persistent n;
n = [n x]
end
myFun(10)
n =
10
myFun(12)
n =
10 12
If in case its necessary to move the variable from the function to base workspace you can use “assignin”
Refer the below links for more information:
1 Commento
Rik
il 3 Dic 2020
Both global and assignin should be considered hacks and are rarely if ever needed.
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Scope Variables and Generate Names in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!