Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least Squares
A computer program for estimating Gompertz curve using Gauss-Newton method of least squares is described in detail. It is based on the estimation technique proposed in Reddy (1985). The program is developed using Scilab (version 3.1.1), a freely available scientific software package that can be down...
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| Format: | Article |
| Language: | English |
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Foundation for Open Access Statistics
2006-04-01
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| Series: | Journal of Statistical Software |
| Online Access: | http://www.jstatsoft.org/index.php/jss/article/view/1487 |
| _version_ | 1819037362981699584 |
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| author | Surajit Ghosh Dastidar |
| author_facet | Surajit Ghosh Dastidar |
| author_sort | Surajit Ghosh Dastidar |
| collection | DOAJ |
| description | A computer program for estimating Gompertz curve using Gauss-Newton method of least squares is described in detail. It is based on the estimation technique proposed in Reddy (1985). The program is developed using Scilab (version 3.1.1), a freely available scientific software package that can be downloaded from http://www.scilab.org/. Data is to be fed into the program from an external disk file which should be in Microsoft Excel format. The output will contain sample size, tolerance limit, a list of initial as well as the final estimate of the parameters, standard errors, value of Gauss-Normal equations namely GN1 GN2 and GN3, No. of iterations, variance(σ2), Durbin-Watson statistic, goodness of fit measures such as R2, D value, covariance matrix and residuals. It also displays a graphical output of the estimated curve vis a vis the observed curve. It is an improved version of the program proposed in Dastidar (2005). |
| first_indexed | 2024-12-21T08:20:13Z |
| format | Article |
| id | doaj.art-66a7d261d7ae49d0bf219a00758398ee |
| institution | Directory Open Access Journal |
| issn | 1548-7660 |
| language | English |
| last_indexed | 2024-12-21T08:20:13Z |
| publishDate | 2006-04-01 |
| publisher | Foundation for Open Access Statistics |
| record_format | Article |
| series | Journal of Statistical Software |
| spelling | doaj.art-66a7d261d7ae49d0bf219a00758398ee2022-12-21T19:10:27ZengFoundation for Open Access StatisticsJournal of Statistical Software1548-76602006-04-0115111210.18637/jss.v015.i1291Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least SquaresSurajit Ghosh DastidarA computer program for estimating Gompertz curve using Gauss-Newton method of least squares is described in detail. It is based on the estimation technique proposed in Reddy (1985). The program is developed using Scilab (version 3.1.1), a freely available scientific software package that can be downloaded from http://www.scilab.org/. Data is to be fed into the program from an external disk file which should be in Microsoft Excel format. The output will contain sample size, tolerance limit, a list of initial as well as the final estimate of the parameters, standard errors, value of Gauss-Normal equations namely GN1 GN2 and GN3, No. of iterations, variance(σ2), Durbin-Watson statistic, goodness of fit measures such as R2, D value, covariance matrix and residuals. It also displays a graphical output of the estimated curve vis a vis the observed curve. It is an improved version of the program proposed in Dastidar (2005).http://www.jstatsoft.org/index.php/jss/article/view/1487 |
| spellingShingle | Surajit Ghosh Dastidar Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least Squares Journal of Statistical Software |
| title | Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least Squares |
| title_full | Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least Squares |
| title_fullStr | Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least Squares |
| title_full_unstemmed | Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least Squares |
| title_short | Gompertz: A Scilab Program for Estimating Gompertz Curve Using Gauss-Newton Method of Least Squares |
| title_sort | gompertz a scilab program for estimating gompertz curve using gauss newton method of least squares |
| url | http://www.jstatsoft.org/index.php/jss/article/view/1487 |
| work_keys_str_mv | AT surajitghoshdastidar gompertzascilabprogramforestimatinggompertzcurveusinggaussnewtonmethodofleastsquares |