Method of extracting data from CSV

1 次查看（过去 30 天）
Mate 2u
Mate 2u 2013-4-12
Dear All, I have a very large CSV file with 5 columns which contains some historical financial prices.
Column 1 is our date starting from 1/3/2007 all the way till till mid 2011 in the form of mm/dd/yyyy.
Column 2 is our time of out trades in the form of :
35:45.0 35:45.0 35:46.0 35:46.0 35:46.0 (as seen in excel)
However when I change the data type of this column in excel from CUSTOM to TIME I get something better which I need:
13:07:23 13:07:24 13:07:24 13:07:25 13:07:25
Column 3 is our respective prices
Column 4 is our symbol (stays the same)
Column 5 is the number of trades.
So my question is I have all of this information...
I want to put the all the columns in one matrix in MATLAB (apart from 4). But I DONT want it to be a string matrix as I want to do some operations with the data.
Hint: May need to convert column 1 and 2 in to number format?

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2013-4-12
fid = fopen('YourFile.csv', 'rt');
datacell = textscan(fid, '%s%s%f%*s%f', 'Delimiter', ',');
fclose(fid);
dates = datenum(datacell{1}, 'mm/dd/yyyy');
outtrades = datenum(datacell{2}, 'MM:SS:FFF');
prices = datacell{3};
ntrades = datacell{5};
datamatrix = horzcat(dates, outtrades, prices, ntrades);
Question: is there no hour in the data?
  6 个评论
显示 4更早的评论
Mate 2u
Mate 2u 2013-4-12
CSV does not fully open on matlabs editor due to the limit of 1 million rows.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Spreadsheets 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by