Chapter 3 Working with MultiLab
85
Power
C
At
y
B
+
=
Draws a line of the time raised to the power of a number from
–
5 to 5.
Note
: If you want the curve fit equation to start at
0
=
t
, apply the crop
tool before any type of curve fitting (see page 89).
To apply manual curve fit:
1. Click on the
Analysis
menu, then click
Manual curve fit
to display
the Manual curve fit dialog box
2. To select a data set for display on the X-axis, click on the data set’s
name in the
X-axis
list
3. To select a data set to display on the Y-axis, click on the data set’s
name in the
Y-axis
list
4. Click
OK
. MultiLab will display the Manual curve fit toolbox at the
bottom of the graph window:
Figure 29: Manual curve fit toolbox
5. Choose one of the four curves by clicking the icon in the toolbox
6. Use the sliders to change the A, B and C parameters until the new
curve fits the sampled curve
7. The lower and upper limits of each sliding bar are located on the
sliding bar’s left and right ends, respectively. You can change the
limit values by clicking a limit box, and typing in your new value
MultiLab will display the resulting equation on the information bar at the bottom of the
toolbox.
8. Click
Add to project
in the toolbox to add the curve to the
project
9. To close the manual curve fit toolbox click
Exit
in the toolbox
