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Transfer variables within function with different properties.

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BdS
BdS on 3 Sep 2019
Commented: BdS on 3 Sep 2019
Hi,
I wrote the following class code:
classdef Copy_of_getPortRawData
properties
PortMembers
PortWeights
end
methods
function obj=getPortRawData(c,PortID,Dates)
obj=getPortMembers(obj,c,PortID,Dates);
obj=getPortWeights(obj,Dates);
end
% 1)
function obj=getPortMembers(obj,c,PortID,Dates)
% Define input parameters
portField={'PORTFOLIO_MWEIGHT'};
override={'REFERENCE_DATE'};
nDates=size(Dates,1);
rawPortData=cell(nDates,1);
% start downloading raw portfolio data
for r=1:nDates
rawPortData{r}=portfolio(c,PortID,portField,override,datestr(Dates(r,1),'yyyymmdd'));
% simplify data storage structure and delete first row
rawPortData{r}=rawPortData{r,1}.PORTFOLIO_MWEIGHT{1,1};
% find unique portfolio members
if r==1
obj.PortMembers=rawPortData{r}(:,1);
else
obj.PortMembers=union(obj.PortMembers,rawPortData{r}(:,1),'sorted');
end
end
end
% 2)
function obj=getPortWeights(obj,Dates)
% construct matrix of weights for each portfolio member and each date
nPortMembers=size(obj.PortMembers,1);
obj.PortWeights=zeros(nDates,nPortMembers);
nDates=size(Dates,1);
for r=1:nDates
ind=ismember(obj.PortMembers,rawPortData{r}(:,1));
obj.PortWeights(r,ind)=transpose(cell2mat(rawPortData{r}(:,2)));
end
end
end
end
My question refers to the code after the line with text % 2)
How does the code look like if I want to work with the variable "rawPortData" coming from the function under the line % 1)?
thanks a lot in advance for your reply.

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Accepted Answer

Adam
Adam on 3 Sep 2019
Either return it as an output argument from the previous function and pass it in as an input argument or store it as a class property.
[obj, rawPortData] =getPortMembers(obj,c,PortID,Dates)
obj=getPortWeights(obj,Dates, rawPortData);
or
obj.rawPortData{r} = ...
and add it to the properties list, though put it in a private access block, not a general access block, if you want to be neat.

  1 Comment

BdS
BdS on 3 Sep 2019
Hi Adam
Thank you for your answer. The first version is from my point of view better as rawPortData gets big as the Dates gets big.

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