[Scilab-users] using csvRead vs mfscanf and fscanfMat

[Rafael Guerra]

Hi,

The problem is not with csvRead, but with the need in the example we are considering here to use the evstr function afterwards on large string data to convert it to useable numeric values.
See time breakdown here below for another 50,000 line input data test:

time1= 0.6552    // mfscanf
time2= 0.4680   // fscanfMat
time3a= 0.2028 // csvRead
time3= 34.3514     // csvRead + evstr

Note that method#2 writes a temporary file to disk and so it will run much faster on PC's with SSD drives.

Regards,
Rafael

-----Original Message-----
From: users [mailto:users-bounces at lists.scilab.org] On Behalf Of Lester Anderson
Sent: Monday, October 17, 2016 10:26 AM
To: Users mailing list for Scilab <users at lists.scilab.org>
Subject: Re: [Scilab-users] using csvRead vs mfscanf and fscanfMat

Hello, I ran the same code on my machine and actually got worse results:

-->exec('Q:\Scilab_code\csvread_write.sce', -1)

    1.    12.    2015.    1.    15.    0.    12.    1.1  - 2.2

    1.    12.    2015.    1.    15.    0.    12.    1.1  - 2.2

!01.12.2015  1  15  0.12  1.1  -2.2  !

time1= 1.21681
time2= 2.19961
time3= 51.7923

Windows 7 64-bit and 64 Gb Ram. (Scilab 5.5.2). Is this a bug if the
csvRead result is so different?

Lester

>>
>> The results for a 50,000-lines input ASCII file are:
>>     time1= 0.686404   // mfscanf
>>     time2= 0.499203   // fscanfMat
>>     time3= 35.3966    // csvRead
>