New Member and Question about Time Series Data (zoo object)

[李倩雯]

Hi all,

Glad to join this group and know some people using R in HK. I began to learn R recently and met a lot of problems. Can anyone in this group help with below question? 

Problem Description

I encountered the Error: cannot allocate vector of size 64.0 Mb when I was using read.zoo to convert a data.frame called 'origin' to zoo object named 'target'

About the Data & Code

My data frame(origin) contains 5340191 obs. of 3 variables[Data, Numeric,Character]

The code looks like

target<-read.zoo(origin,format="%m/%d/%Y",index.column=1,split=3)

SessionInfo:

R version 3.1.2 (2014-10-31)

Platform: x86_64-w64-mingw32/x64 (64-bit)

Installed memory: 4.00 GB (3.82 GB usable)

Result of memory.size() : 3812.85

I try to calculate the required memory but I don't know what are the operations in such conversion process. Therefore I have no idea if my data is too mass to handle or I was using a low efficient method. 

Best regards,

Jasmine

[C.H.]

Use object.size to determine the size of origin. Probably you didnt have much memory left after loading origin.

The character column maybe the reason for out of memory. Consider dropping it if it is not absolutely need for the entire series.

A typical solution is either get a better computer or split the data in parts (if it is okay).

Btw, we have a facebook group too.

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