Sunday, September 20, 2015

HP Prime Spreadsheet App Tutorial 5: Spreadsheets and Histograms

HP Prime Spreadsheet App Tutorial 5:  Spreadsheets and Histograms





Lesson 5 Objectives:

* Generate a random list of integers for a column
* Store a Spreadsheet column to a Statistics Variable
* Use a Spreadsheet column in a histogram

Generate a random list of integers:

RANDINT(length of list, lower limit, upper limit).  The result is a list.


Steps:

1.     Start by selecting the header cell for Column A.  Press [ Toolbox ], 5 for Probability, 4 for Random, 2 for Integer to call the RANDINT function.   A list a generated, so no equals sign is needed.  Enter 100 for the length of list, 0 for the lower limit, and 100 for the upper limit.  The result is RANDINT(100,0,100).  Press the soft key ( OK ).
2.    Name Column A DATA.   Go to the header cell, enter DATA, and press on the soft key ( Name ).
3.    Press the [ Home ] button.  Select the D1 variable from the Statistics 1Var app by pressing [ Vars ], the ( App ) soft key, then Statistics 1Var, then Numeric, and D1. 
4.    Continue by entering DATA.   (colon, equals, DATA).   The complete command should be Statistics_1Var.D1DATA.
5.    On to the Histogram:  Press the [ Apps ] and choose the Statistics 1Var app.   You’ll be taken to the Num view and D1 should be filled in.
6.    Press the [ Symb ] key for the Symbolic view.   Enter D1 for H1 and select Histogram. 
7.    Press [ Shift ], [ Plot ] (Plot Setup).   Change the H Width to 10. 
8.    Press [ View ] and select Autoscale.    This Histogram is complete.




This concludes Lesson 5.  I plan to post additional lessons in the near future.   

Eddie


This blog is property of Edward Shore,  2015.

3 comments:

  1. Hello Eddie,
    Thank you very much for this tutorial series. I'm taking Intro to Microeconomics and using the HP Prime calculator spreadsheet app to program some repetitive calculations. Is there a way (that I'm obviously missing) to save a spreadsheet file and later load that file? Or is the spreadsheet app completely working memory based?
    Thank you so much,
    Chuck

    ReplyDelete
  2. Well, I just found the answer to my own question. With the spreadsheet constructed, return to the APPS screen and select "Save" and provide a name. To load, simply highlight the newly saved spreadsheet and hit "Enter". Sorry for any inconvenience.

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  3. Hi Eddie,
    up to now all tuts did work as they should. But this one wont. If I clear the table and set the cursor to the head of col A and call RANDINT(100,0,100), I get a huge table. Trying Randint(3,0,3), I get in col A more than 1000 rows with 0 (os 1 or 2 or 3), same in col B and in col C also same. First number in Randint gives the number of columns, 2nd and 3rd the min and max. I never get the result that you are showing with only a filled col A. You are describing every single step, so there is no possibility for doing anything wrong.

    ReplyDelete

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