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Get Difference in days between two dates as a number

less than 1 minute read

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The following R script subtracts two dates and get the difference in days. The dates are in the String format. Thus, the R script has to use date format to convert the strings into dates.

portfolio

publications

Incorporating Random Forest Trees with Particle Swarm Optimization for Automatic Image Annotation

Published in Federated Conference on Computer Science and Information Systems, 2012

Techniques used: Visual Features Extraction, Clustering, Image Segmentation, Particle Swarm Optimization and Random Forest Models.

Recommended citation: Mohamed Sami, Nashwa El-Bendary, Aboul Ella Hassanien and Robert C Berwick (2012). " Incorporating Random Forest Trees with Particle Swarm Optimization for Automatic Image Annotation. " Federated Conference on Computer Science and Information Systems.

Automatic Image Annotation Approach Based on Optimization of Classes Scores

Published in Computing, 2013

Techniques used: Visual Features Extraction, Image Segmentation, Particle Swarm Optimization and Random Forest Models.

Recommended citation: Nashwa El-Bendary, Tai-hoon Kim, Aboul Ella Hassanien and Mohamed Sami. (2013). " Automatic Image Annotation Approach Based on Optimization of Classes Scores." Computing.

Studying the Needed Effort for Identifying Duplicate Issues

Published in Empirical Software Engineering, 2015

Techniques used: Textual Similarity, Random Forest Models, Scott-Knott, Statistical Analysis and Quantile Regression.

Recommended citation: Mohamed Sami Rakha, Weiyi Shang, and Ahmed E.Hassan. (2015). "Studying the Needed Effort for Identifying Duplicate Issues " Empirical Software Engineering.

Revisiting the Performance Evaluation of Automated Approaches for the Retrieval of Duplicate Issue Reports

Published in IEEE Transactions of Software Engineering, 2017

Techniques used: Information Retrieval, Genetic Algorithms, Statistical Analysis and Analysis Visualization.

Recommended citation: Mohamed Sami Rakha, Cor-Paul Bezemer, and Ahmed E.Hassan. (2017). " Revisiting the Performance Evaluation of Automated Approaches for the Retrieval of Duplicate Issue Reports ." IEEE Transactions of Software Engineering.

talks

teaching

Teaching experience 1

Undergraduate course, University 1, Department, 2014

This is a description of a teaching experience. You can use markdown like any other post.

Teaching experience 2

Workshop, University 1, Department, 2015

This is a description of a teaching experience. You can use markdown like any other post.