From 992ad77b19550b0db4c0d992683509e2b4266374 Mon Sep 17 00:00:00 2001
From: Samuel Fadel <samuelfadel@gmail.com>
Date: Tue, 26 May 2015 15:21:27 -0300
Subject: Main program can now read dataset from standard input if no arguments
 are given.

---
 main.cpp | 59 ++++++++++++++++++++++++++++++-----------------------------
 1 file changed, 30 insertions(+), 29 deletions(-)

diff --git a/main.cpp b/main.cpp
index 0f7f8c8..2024ae7 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,6 @@
 #include <cmath>
 #include <memory>
+#include <iostream>
 #include <QSurfaceFormat>
 #include <QApplication>
 #include <QQmlApplicationEngine>
@@ -20,35 +21,35 @@ int main(int argc, char **argv)
     QSurfaceFormat::setDefaultFormat(fmt);
     QQmlApplicationEngine engine(QUrl("qrc:///main_view.qml"));
 
-    std::unique_ptr<InteractionHandler> interactionHandler((InteractionHandler *) 0);
-    if (argc > 1) {
-        arma::mat dataset;
+    arma::mat dataset;
+    if (argc > 1)
         dataset.load(argv[1], arma::raw_ascii);
-        arma::mat X = dataset.cols(0, dataset.n_cols - 2);
-        arma::vec labels = dataset.col(dataset.n_cols - 1);
-
-        arma::uword n = dataset.n_rows;
-        arma::uword subsampleSize = (arma::uword) sqrt(n) * 3;
-        arma::uvec sampleIndices = arma::randi<arma::uvec>(subsampleSize, arma::distr_param(0, n-1));
-        arma::mat Ys = arma::randn(subsampleSize, 2);
-        Ys = mp::forceScheme(mp::dist(X.rows(sampleIndices)), Ys);
-        arma::mat subsampleData(subsampleSize, 3);
-        subsampleData.cols(0, 1) = Ys;
-        subsampleData.col(2) = labels(sampleIndices);
-
-        Scatterplot *subsamplePlot = engine.rootObjects()[0]->findChild<Scatterplot *>("subsamplePlot");
-        subsamplePlot->setAcceptedMouseButtons(Qt::LeftButton | Qt::MiddleButton | Qt::RightButton);
-        subsamplePlot->setData(subsampleData);
-        Scatterplot *plot = engine.rootObjects()[0]->findChild<Scatterplot *>("plot");
-
-        // connect both plots through interaction handler
-        interactionHandler = std::unique_ptr<InteractionHandler>(new InteractionHandler(X, labels, sampleIndices));
-        QObject::connect(subsamplePlot, SIGNAL(dataChanged(const arma::mat &)),
-                         interactionHandler.get(), SLOT(setSubsample(const arma::mat &)));
-        QObject::connect(interactionHandler.get(), SIGNAL(subsampleChanged(const arma::mat &)),
-                         plot, SLOT(setData(const arma::mat &)));
-        interactionHandler.get()->setSubsample(Ys);
-    }
-
+    else
+        dataset.load(std::cin, arma::raw_ascii);
+
+    arma::mat X = dataset.cols(0, dataset.n_cols - 2);
+    arma::vec labels = dataset.col(dataset.n_cols - 1);
+
+    arma::uword n = dataset.n_rows;
+    arma::uword subsampleSize = (arma::uword) sqrt(n) * 3;
+    arma::uvec sampleIndices = arma::randi<arma::uvec>(subsampleSize, arma::distr_param(0, n-1));
+    arma::mat Ys = arma::randn(subsampleSize, 2);
+    Ys = mp::forceScheme(mp::dist(X.rows(sampleIndices)), Ys);
+    arma::mat subsampleData(subsampleSize, 3);
+    subsampleData.cols(0, 1) = Ys;
+    subsampleData.col(2) = labels(sampleIndices);
+
+    Scatterplot *subsamplePlot = engine.rootObjects()[0]->findChild<Scatterplot *>("subsamplePlot");
+    subsamplePlot->setAcceptedMouseButtons(Qt::LeftButton | Qt::MiddleButton | Qt::RightButton);
+    subsamplePlot->setData(subsampleData);
+    Scatterplot *plot = engine.rootObjects()[0]->findChild<Scatterplot *>("plot");
+
+    // connect both plots through interaction handler
+    std::unique_ptr<InteractionHandler> interactionHandler(new InteractionHandler(X, labels, sampleIndices));
+    QObject::connect(subsamplePlot, SIGNAL(dataChanged(const arma::mat &)),
+                        interactionHandler.get(), SLOT(setSubsample(const arma::mat &)));
+    QObject::connect(interactionHandler.get(), SIGNAL(subsampleChanged(const arma::mat &)),
+                        plot, SLOT(setData(const arma::mat &)));
+    interactionHandler.get()->setSubsample(Ys);
     return app.exec();
 }
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