Applied Statistics Using SPSS, STATISTICA, MATLAB and R

44 2 Presenting and Summarising the Data
hist(y,x), plots a bar graph of the y frequencies, using a vector x with the
categories. For the PClass variable one would have to write down the following
commands:
» cat=[1 2 3]; %vector with categories
» hist(pclass,cat)
Figure 2.10. SPSS Define Simple Bar window, for specifying bar charts.
Figure 2.11. The SPSS Chart Editor, with which the user can configure the
graphic output (in the present case, Figure 2.9). For instance, by using Color
from the Format menu one can modify the bar colour.