What is a bar chart ? The
bar chart is normally used of display
change over a time period. The length of
each bar repesents the value of the data
point for a given variable.
When are bar
charts best used ? To compare absolute values or quantities
with each other and at the same time display
the relative size of the value compared
to the base line value. In most cases the
base line is zero and so each bar has a
length related to the absolute value of
the data point.
comparing groups or classes of data.
What is the difference between a bar chart
and a column chart ? There is no significant
diference between and bar chart and a column
chart, "Column"
charts in excel are vertical
and "Bar" charts are horizonal.
They both use a "bar" to represent
data using the length of the bar the represent
a value. How to create a simple column chart
(single independent variable)
How to create a column chart of two independent
variables
Creating a column chart of multiple independent
variables (automatic)
Creating a column chart of multiple independent
variables (imposed series)
Comparing column
chart representations of the same data.
Comparing column charts represnations and
line charts representation of the same data.
In some cases it can be benificial to display
data using another type of chart in excel.
When the monthly avrage rainfall for each
region is displayed for a period of tweleve
months the relative changes between values
is ghard to see as the bars begin to interfer
with the communication of the data. The relative
change in average rainfall is hard to see
as the clusters of data contain too much
visual information. As te relative laue of
the data points to each other and the relative
value of the datsa points to the base line
are displayed at the same time.
When the same data is displayed as a line
chart and each region is overlaid clear comparisons
can be made as the it becomes more important
to asses the relative value of data points.
What is the difference
between a bar chart and a histogram
?
Bar chart tips
watch out for inconmsistent scales
make
sure all clases or categoroes are equal.
make sure all the intervals between classes
are equal.
Related
Knowledgebase Pages Method I vs Method II bar
chart
Bar vs histogram
Related
QuickSkills How to make a bar chart
Bar chart formatting Index
Changing the color of bars
Changing the seperation of bars
