Radio Shack TRS-80 Model 100 Basic Manual page 207

*
* ****
* ****
* ****
* ****
* ****
* ****
* ********
* ********
* ********
* ************
*
************
* ************
* ************
* ************
* ************
* ************
* ************
* ************
* **************** ****
* **************** ****
*
****************
****
* ************************************
* ************************************
* ************************************
* ****************************************
* ****************************************
* ****************************************
*
****************************************
* ****************************************
**************************************************************************
1 2 3 4 5 6 7 8 9 10
Figure 3A-2. Printer Histogram
If you request printer output, you will also obtain a listing of the class intervals and
the corresponding frequencies of occurence within each interval. This is illustrated in
Figure 3A-3. The frequency is the number of data values which occur within the class
boundaries. For example, in Figure 3A-3, there are seven data values within the
approximate boundaries 27.8 to 35.7.
CLASS NUMBER
1
2
3
4
5
6
7
8
9
10
12
18.8
27.8
35.7
43.6
51.5
59.4
67.8
75.2
88.1
CLASS
TO 19.9
TO 27.8
TO 35.7
TO 43.6
TO 51.5
TO 58.4
TO 67.3
TO 75.2
TO 83.1
TO 81
FREQUENCY
3
3
7
10
8
4
3
4
3
2
Figure 3A-3. Listing of Class Intervals
Explanation of the Program:
Line 188 The data values will be stored in the array A and the frequencies for the
histogram will be stored in the array F. The maximum number of data values is 100.
Lines 195 - 159 This part of the program allows the user to indicate whether the data
will be read from a RAM or cassette file and to input the file name. The file name is
stored in N$ along with the device (either RAM: or CAS:).
201