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File Exchange > Category:Data Exploration >
   Tafel Extrapolation (Estimate Ecorr and Icorr)

Author:

Cran Chu

Date Added:

3/25/2006

Downloads:

2743

Last Update:

3/25/2006

Total Ratings:

7

File Size:

146030 Bytes

Average Rating:

File Name:

Tafel.opk

Created Using:

Origin 7.5

File Version:

1.0

Working Versions:

7.5

License:

Free

Summary:

Draw two tangents for estimating the Tafel Extrapolation in a graph curve.

Description:

A. Requirements

Origin 7.5 SR0 or higher.


B. Installation

Run Tafel.opk by double-clicking the file or drag-and-drop it to Origin interface. Setup will create the 3-buttons Tafel toolbar. The demonstrated GIF file Tafel.gif and Sample OPJ file Tafel.opj also are including in this pack.


C. Operation

Left button [Tangent1]:
Start Data Reader tool to get first coordinate of a given curve. Press Enter or double-click on a point to plot Tangent 1 (Magenta color) to the curve at that point. The formula of Tangent 1 is shown in a text label (Magenta color) at the top-left of the graph.

Middle button [Tangent2]:
Also use the Data Reader tool to get second coordinate of a given curve. Press Enter or double-click on another point to plot Tangent 2 (Cyan color) to the curve at that point. The formula of Tangent 2 is shown in a text label (Cyan color) at the top-right of the graph.

Right button [Intersection]:
After the selection of two tangents is well done, single-click this button, and therefore the intersection of two tangents will be estimated. The coordinate of Intersection is shown in a text label (Yellow and Green color) at the bottom of the graph.


D. Programming Note
Curve_derivative function in Origin C language has a smoothness parameter that affects the calculated derivatives. This tool uses Origin 7.5 default value for that parameter BSPLN_OFF. If your tangents appear to be wrong, you could adjust the smoothness parameter in the file Tafel.c. For details, please look for Curve_derivative in Origin Programming Help System. (Located on Programming \ Origin C Language Reference \ Global Functions \ Analysis \ Curve_derivative.


E. Contact the Author
It is my first program design in my life for academic application. I study in PhD of Materials Engineering in Taiwan at present. I feel so happy when I finished this program. Please email any questions, suggestions or bug reports to me if the program is not satisfied or need to be modified, thanks.

Screen Shot:

img
 

Reviews:

Rated by: mazdak86

Date: (6/14/2012 4:58:20 AM)

Hi, thanks for your program. However, when I try to select the points by double clicking or by enter bottom, the tangent line does not appear and by trying to enter the second tangent , the information of the first one is discarded. Consequently, at the end there is neither tangential lines nor their intersection. can you help pleas?

Rated by: amal.chem

Date: (6/22/2010 12:02:59 PM)

thank you very much that agood method and A VERY USEFUL TOOL

Rated by: Javier Quinones

Date: (4/9/2010 7:52:05 AM)

Rated by: KARTHIK KUMAR

Date: (4/23/2006 3:57:32 AM)

A VERY USEFUL TOOL

Rated by: Cran Chu

Date: (3/26/2006 2:55:44 PM)

Thanks, I'm so happy that you like it. This program is base on tangent.c by you made (I think so). You're too great for sharing a lot of useful tool, thank you again. ^O^

Rated by: Cran Chu

Date: (3/26/2006 2:25:58 PM)

Thanks, I'm so happy that you like it. This program is base on tangent.c by you made (I think so). You're too great for sharing a lot of useful tool, thank you again. ^O^

Rated by: Mike Buess

Date: (3/26/2006 11:38:59 AM)

Haven't tried the tool yet but I really like the screen shot. Excellent use of animation!

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