Write data from csv to float array

[Jasur]

I have CSV file with 2 columns and 20 rows, how to write each column in to two float arrays. For example i could do it with QVector, but how to do it with arrays, there is array Fi and Lyamda.And how to convert QStringlist to Float?

float Fi[20];
float Lyamda[20];
int rowCount=0;
QString line;

QStringList qList;
QFile File("F:\\data.csv");
QVector<float> z;

if(File.open(QIODevice::ReadOnly))
{
    QTextStream out(&File);
    while(!out.atEnd())
    {
        line=out.readLine();
        line=line.mid(0,line.length());
        qList=line.split(";");
        z.append(qList[1].toFloat());
        rowCount++;
    }
    File.close();
}

Regards,
Jasur

[mrjj]

Hi
Why do you want c type array?
Its rarely it would offer any benefits over std::vector or Qt versions.

Anyway, you need to keep track free index to insert in.

// rest
int FiFree=0;

while(!out.atEnd()) {
...
Fi[FiFree++] = qList[1].toFloat();

• .And how to convert QStringlist to Float?
  You mean each string in the list to a float value?
  Just loop it over and use toFloat().

[dheerendra]

int i=0;
while(!file.atEnd()) {
QString line = file.readline();
QStringList cols = line.split(",");
fi[i] = cols.at(0).toFloat();
lamada[i++] = cols.at(1).toFloat();
}

[Jasur]

@mrjj i tried this doesn't work Fi[FiFree++] = qList[1].toFloat();

[mrjj]

@Jasur
In what didnt work ?

[Jasur]

@mrjj after qList[1] i can't put dot, there is no functions for qList[1].
P.S sorry for my english if i can't explain

[mrjj]

@Jasur
but it does know qList ?
Just type toFloat() then.

it does work.
This compiles and write expected output.

#include <QStringlist>
#include <qDebug>

float list[10];
QStringList strlist;
strlist << "1.122";
list[0]=strlist[0].toFloat();
qDebug() << list[0];

update
Ahh i see what you mean.
in my sample, it wont auto complete anything on
strlist[0].
At all. Must be a bug.

[Jasur]

@mrjj yes there is no auto complete afer qList[0], oh sorry i forget to tell you, that mr.Dhreerendas code work, this is what i wanted. Thank you

[Jasur]

Great thanks to you both.