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- MLS v1.5 (Method of Least Squares)
-
- Written By Brian Olson
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- This is ShareWare
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- if you find this program useful
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- please send at least $10 to the Author
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- to encourage Updates.
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- Authors Address:
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- Brian Olson
- 11 Limetree Lane
- Liverpool, NY 13090
- USA
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- The Method of Least Squares is a graphical analysis program that
- determines the relationship between two sets of data. Plotting the two
- sets of data against each other and drawing a line which touches, or comes
- close to, all of the data points (The Best Fit Line) then the equation of
- that line would tell you how the two sets of data are related.
- Once the relationship is determined you could extrapolate to find
- ALL possible data points.
- However drawing the Best Fit line can be very difficult, expecially
- if the data doesn't represent a straight line. The Method of Least Squares
- makes this process easy, it will determine the Best Fit Line for you.
- There are, however, many repetitive calculations in calculating the
- Best Fit Line, therefore I decided to write a program to do it for me.
- To make life even easier for the User, I installed a couple of
- preset relationships into the program. They are
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- Relationship Representative
- Equation
- ( a and b are constants
- to be determines )
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- Linear (Definatly Need this one) Y = aX + b
- Power Y = aX^b
- Exponential Y = aEXP(b)
- Logarithmic X-Axis Y = aLOG10(bX)
- Logarithmic Y-Axis LOG10(Y) = aX + b
- Logarithmic X & Y Axis LOG10(Y) = aLOG10(X) + b
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- The first thing you need to do is make a "points" file. Just load up your
- favorite text editor and enter in the X and Y data points, one set of X and
- Y points per line
-
- {ex.}
- 1.32 2.42
- 2.43 3.53
- 3.46 4.57
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- it's as easy as that. Next load up the MLS program and click in the points
- filename gadget, enter the name of the file you just created, hit Enter and
- then click on the LOAD Button. The Status window will tell you what's going
- on.
- Once the points are loaded, they are plotted in the bix box on the
- screen. The X and Y Axis Ranges are shown just below the box. By looking at
- the positions of the points it's possible to determine the type of
- relationship. Using this guess, click on the little button next to the
- relationship you believe these points to represent. Now click on CALCULATE.
- The resulting line will be drawn. If it doesn't come close to looking like
- the Best Fit line you probably selected the wrong Regression Mode. If it
- DOES look like the best fit line, you can note the equation in the status
- line, or if you want a more elaborate display of data click on the SAVE
- button. A data file with the same name are your points file but with a
- .REG extenstion will be created.
- If the Regression Mode of the points is not one of the Preset mode
- then you have to decide what it represents, and then convert it to a Linear
- equation, converting the points along with it. And run the program and
- LINEAR with your NEW points. I won't really go into this process.
-
- Well. I guess that's about it... Enjoy...
-