This macro creates a fitted line plot that goes through the origin.
Download the Macro
Be sure that Minitab knows where to find your downloaded macro. Choose
.
Under
Macro location
browse to the location where you save macro files.
Important
If you use an older web browser, when you click the
Download button, the file may open in Quicktime,
which shares the .mac file extension with Minitab macros. To save the macro,
right-click the
Download button and choose
Save target as.
Required Inputs
- One column of dependent dta
(Y)
- One column of independent
data (X)
Optional Inputs
- CONF K
- The default confidence interval is 95%, but you can change the
default by using the subcommand CONF followed by the interval you want to use
(1-99).
- CI
- Use to show the 95% confidence bands.
- PI
- Use to show the 95% prediction bands.
- REDIDS C
- Use to store the residuals of the regression through the origin in
the specified column.
Note
It is strongly suggested that the residuals from any regression
model be examined for randomness and normality.
- TITLE “text”
- Use to specify a custom title for the graph.
Running the Macro
Suppose your dependent variable, Y, is in C1 and your independent
variable, X, is in C2. You want to change the confidence level to 90% and store
the residuals in column C3. To run the macro choose
and type:
%ORIGIN C1 C2;
CONF 90;
RESIDS C3.
Click
Run.
More Information
You can create this graph manually with Minitab commands.
- Choose
.
- Under
Y variables
enter
C1. Under
X variables enter
C2.
- Click
Data View, then click the
Regression tab.
- Uncheck
Fit intercept. Click
OK in each dialog box.