Using a Computer to Make and Print a Scatterplot
Date: 11/23/2003 at 11:54:52 From: Iris Subject: Making a Scatter Plot on the computer I am taking a statistics course. I know how to make a scatterplot and I can use my TI83 but we have a project where we need the scatterplot on paper to turn in. I am comparing the size of diamonds to their prices. I have a lot of data points over a wide range and do not want to make my graph by hand. I was wondering if there is some program that I could use online or on my computer? I have heard that you can use a spreadsheet, but I don't have the slightest clue how they work. If you have any suggestions I would love to hear them. Thanks!
Date: 11/24/2003 at 06:16:29 From: Doctor Jeremiah Subject: Re: Making a Scatter Plot on the computer Hi Iris, To do something with your computer you must have software that can do what you want. In your case you would need software that can make a scatterplot. A spreadsheet can definitely do that, but since I don't know what type of spreadsheet you have, I can't tell you how to use it. Let's see if we can find something on the internet that will work. After some looking around I found this page: http://illuminations.nctm.org/mathlets/grapher/index.html If you go to that page you will notice a graph that has a panel underneath with these four tabs: Graph, Window, Y= or Plots, and Data Just ignore all the stuff in the panel below the tabs. Click on the Data tab. Now the graph is replaced with a spreadsheet. It is made up of rows and columns of 'cells'. Column A will be the size of the diamond and Column B will be the price. So for each diamond put the size and price into the corresponding columns of the spreadsheet, each one on a new row. There is a scroll bar on the right side so that you can scroll down and get more empty rows. After all the data is entered, click the "Y= or Plots" tab. Check the box beside the phrase "Plot 1: Column A, Column B". Now click the "Window" tab. Since we don't have negative diamond sizes and prices enter 0 into the box beside "x min = " and "y min =". Then stick the maximum value from Column A into the box beside "x max =" and stick the maximum value from Column B into the box beside "y max =". Now click the "Graph" tab and the graph will be displayed. Just print out the web page with your printer. If you want a fancier looking graph (with title, axis labels, legend, etc.) then you really do need spreadsheet software on your computer (which might already be there...). Much of what we did here will also work on your spreadsheet. Good luck! - Doctor Jeremiah, The Math Forum http://mathforum.org/dr.math/
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