Scala array operations

Scala does not have pandas, but we can emulate some of that logic with our own coding. We will use the Titanic dataset used inChapter 2, Jupyter Python Scripting, from http://titanic-gettingStarted/fdownload/train.csv which we have downloaded to our local space.

 

We can then use similar coding to that used in Chapter 2, Jupyter Python Scripting, for pandas:

import scala.io.Source; 
 
val filename = "train.csv" 
//PassengerId,Survived,Pclass,Name,Sex,Age,SibSp,Parch,Ticket,Fare,Cabin,Embarked 
//1,0,3,"Braund, Mr. Owen Harris",male,22,1,0,A/5 21171,7.25,,S 
 
var males = 0 
var females = 0 
var males_survived = 0 
var females_survived = 0 
for (line <- Source.fromFile(filename).getLines) { 
    var cols = line.split(",").map(_.trim); 
    var sex = cols(5); 
    if (sex == "male") {  
        males = males + 1; 
        if (cols(1).toInt == 1) { 
            males_survived = males_survived + 1; 
        } 
    } 
    if (sex == "female") {  
        females = females...