VOStat Change Log

 

 

Features in VOStat  beta jsp 1.0 (Web based version) Release date 14th Nov 2008

 

• No need to select input file type before loading (Checked programatically)
• Multiple files can be uploaded
• There are some changes in the output display format
• Some changes in R code of few tests
• New tests DotChart, Parellel Plot have been added
• Tests related changes are listed below

          

        ANOVA
        Output is displayed in a tabular format
        Change in output heading

 

        BoxPlot
.       Reduce the width. Option to plot boxes separately (for different units & ranges) and together (same units, similar ranges)
 

        Correlation Matrix
        Download matrix.. Display values only up to four digits. User can choose no of decimal places and rerun the test .Default is 4.
        Display only martix
 

        Covariance
        Display 4 digits only. Dotchart is added under 'Descriptive statistics'.

        Empirical Distribution Function.
        Remove circles on the plot

        Hierarchical Clustering
        Display and download cluster memberships. Rename "H clustering" to "Hierarchical clustering"

        K-means partitioning
        Display and download cluster memberships. Some changes in output display.
       

        Histogram
        Removed Sturges and Class interval. Save & download list of breaks and counts.

        Kernel Smoothing
        Droped cosine and Optcosine options.
        "Automatic" option with gaussian kernel and bandwidth.nrd for bandwidth.
         "Manual" option where user sets kernel type and bandwidth.
        Download curve at ~500 points.
       

        Kolmogorov Smirnov one sample test
        In Gaussian distribution fun = dnorm and plot with pnorm. In exponential distribution fun = pexp
        Display the value of statistic,  change table value to tabulated value  and  removed Dnmax and $statistic

        One sample and two sample t-test
        Add selected column/s,  display mean of x, removed t-obs and $p.value

        Kolmogorov Smirnov two sample test
         Add plot of the two ecdf's

        Pair Plot

        Use pch= 20, col=1.
       
        Principal Component Analysis
        add covariance matrix, add correlation matrix
        In covariance matrix output , replaced rotations by loadings
        Display output header according to the matrix selected
        Use princomp and prcomp, calculate and display eigen values

        Quantile Quantile Plot
        Removed completely.

        Testing for mean when variance is known
        Removed.

        X-Y Plot
        Moved to Descriptive statistics, and renamed as "Bivariate plots".

        Single or Multiple linear Analysis
        Displaying slope
 

Features in VOStat v1.1 beta (Stand alone version)  Release date 14 Nov 2008

 

• PLASTIC is supported. (new Interop menu has been added).
• Internal PLASTIC Hub.
• Handles multiple files
• All tests functionality remains same as VOStat v 1.0 beta

Features in VOStat v1.0 beta (Stand alone version)  Release date 17 Aug 2007

• ASCII or VOTable files can be given as input
• 26 different tests are grouped in 10 categories
• Log and Exponential transformations can be applied to the input
• Test results are formatted properly and can be saved
• Result plots can be viewed and saved in different formats
• R code for the test is available
• Input file can be plotted on VOPlot directly
• Brief statistical help for every test is available