Graphics

Specifying X-Axis Data

Bar graphs automatically generate x-axis values and label the x-axis tick lines. You can specify a vector of x values (or y values in the case of horizontal bar graphs) to label the axes.

For example, given temperature data,

• temp = [29 23 27 25 20 23 23 27];
  

obtained from samples taken every five days during a thirty-five day period,

• days = 0:5:35;
  

you can display a bar graph showing temperature measured along the y-axis and days along the x-axis using

• bar(days,temp)
  

These statements add labels to the x- and y-axis.

• xlabel('Day')
  ylabel('Temperature (^{o}C)') 
  

Setting Y-Axis Limits

By default, the y-axis range is from 0 to 30. To focus on the temperature range from 15 to 30, change the y-axis limits.

• set(gca,'YLim',[15 30],'Layer','top') 
  
  
  

Stacked Bar Graphs to Show Contributing Amounts

Overlaying Plots on Bar Graphs