diff --git a/classes/11feb.R b/classes/11feb.R
new file mode 100644
index 0000000..48d5432
--- /dev/null
+++ b/classes/11feb.R
@@ -0,0 +1,32 @@
+# == COMPARANT FUNCIONS TEÒRIQUES I EMPÍRIQUES ==
+y = rnorm(100)
+
+# Densitats de probabilitat
+hist(y, freq=F) # freq=F fa que la suma sigui 1 (si no passarà que serà la suma
+                # de freqüències)
+curve(dnorm(x), add=T)
+curve(dnorm(x, 0, 1.2), col="red", add=T)
+curve(dnorm(x, 0.1, 1), col="blue", add=T)
+
+# Funcions de probabilitat acumulada
+plot(sort(y), (1:100)/100, type="S")
+curve(pnorm(x), add=T)
+curve(pnorm(x, 0.1, 1), col="red", add=T)
+
+z = matrix(y, nrow=10, ncol=10)
+z
+
+# == DATA FRAMES ==
+x = rexp(100)
+x
+d=data.frame(x, y)
+head(d)
+d$x
+d$y
+d[1,]
+d[,1]
+d[,2]
+
+dd = data.frame(x, y, z)
+dd$z
+head(dd)