Welcome to The Data Workshop Two! If it is slow, use turbo! I've found that Exponential regression and Power regression don't work online if any of the points include a negative x or y. So download if you need to. New Stuff: -Slightly different interface -Data automatically goes in order by x values -Ability to change colors of point connection and graph. -"Are you sure?" message for Clear All. -Ability to enter minimums for x and y. -Data and min/maxes can be negative. -Ability to show and hide grid -Shows the axis -Ability to change the "step" that the grid marks -New "place point" funtion- click on the graph to add a point (inspired by ffred's suggestion) -Keyboard Shortcuts -Auto Fit (Paddle2See's suggestion) Entering Data: Click "Enter Point" to enter a point of data. Enter your point as x,y. To place a point on the graph with your mouse, click "Place Point" and click on ther graph where you want to point to be. To delete one point, press "Delete Point" and type the item number of the point you want to delete. That item number will be deleted from both the x list and the y list. To delete all of the data, press "Clear All." Keyboard Shortcuts: Do you have a lot of data to enter and don't want to keep pressing the buttons? Press "e" to enter a point and "p" to place a point. Graphing Points: Your points will automatically be graphed after you enter them. The minimums and maximums for x and y are shown on the side of the graph. The "steps," or intervals between grid marks are shown below. Step can also be called "scale" Press the purple rectangle that says "Graph Settings" to dropdown a menu and change mins, maxes, and step. To make the graph fit the data without enter mins, maxes, and steps, predd "Auto Fit." You can choose whether to connect your points or not by presssing the green square next to "Connect Points." Change the color with the color picker. Finding Equations: When you press "Find Linear Eq," "Find Exponential Eq," or "Find Power Equation," it will find the equation of that type that fits the data best. If you press "Find Best Eq," it will figure out whether a linear, exponential, or power equation fits best and will show you that equation. The "Correlation Coefficient" shows how close the equation fits the data. The closer the absolute value is to 1, the better it is. Graph the Equation: Simply press "Graph Equation" to graph the equation. Change the color with the color picker. How It Works: This uses least- squares linear regression to find the equations. I've yet to find a simple explanation online- if you find one, let me know. If you find a glitch or have a suggestion, let me know. If you love it, press that button. Gracias for viewing my project. Don't expect a project (and especially not a big one) for a while. I'm kind of out of ideas, plus I'm Pythoning, plus school is getting close and I'm sure I'll have loads of homework... But the good thing about school is that I'm starting Calculus and I'm sure that will give me ideas. :P The End. If you read the whole thing, you get a cookie. :)
