# BrightStat tips

#### Problem with Firefox on Windows

Occasionally variables can not be selected in variable lists in BrightStat's web application. In such a case try another web-browser. Generally I recommend Chrome, Edge or Safari for BrightStat.com web application.

#### 2016-05-12

You can upload your data in Microsoft Excel format. If this does not work, you can always export your data as a tab-delimited text file from within Microsoft Excel and upload the text file. This should work properly. Read more about how to prepare your data for BrightStat

#### Presicion

By default brightstat rounds the results to five and p-values to three decimal places. If you need more presicion, just click on the the result cell in the output table.

#### Automatic recode

Brightstat lets you recode categorical variables, often coded as strings, into ascending numbers automatically. Just select 'Automatic Recode' in the 'Data Menu' and indicate the variables to be recoded. The old values will be stored as value labels for the new numeric variable.

#### Brightstat sample files

In the 'Data Menu' there is 'Load Sample Datafile' in the first column 'Data File'. There you'll find a list of sample files (including files for all examples on Brightstat's website). So you can start discovering Brightstat right away.

#### Brightstat calculator

Brightstat has a built in calculator which allows you to compute new variables with existing ones. If you have measured the weight (in kg) and height (in meters) of n subjects you can easily compute the body mass index (BMI) for all subjects. If your variables are named 'weight' and 'height' the formula would be: _weight/_height^2.
The sample file 'BodyFat' contains the variables 'Weight' (pounds) and 'Height' (inches), so the formula for calculating the BMI needs some adjustment in that case: (_Weight*0.45359237)/(_Height*2.54/100)^2.
Note: In the formula a variable name is always preceded by an underscore '_'.

#### 2015-09-03

Brightstat is not intended to be a data editor. Small changes can be done without problems but be aware that editing your data in Brighstat's data window may be very time consuming, especially with larger data files.
It is strongly recommended to prepare your data for Brightstat before uploading it into the database. A period '.' will be treated as a missing value.
How to prepare your data for Brightstat

#### Set data filter

You can define a filter variable for your data. Analysis and graphs are then performed for selected cases only. Select 'Filter Data' from the menu and indicate which values of which variables should be included in the analysis.

#### 2015-08-04

You can split your datafile using a categorical variable. All tests and/or graphs are then performed for the individual categories of the split variable. Select 'Split Data' from the menu and indicate one or more split variables.

#### Define value labels

Brightstat works best with all your variables in number format. However, for categorical variables you can define value labels. These will be used instead of the number values in output tables and graphs. In the data or the variables window select 'Define Value Labels' from the menu.

#### Sort data

You can sort your data by clicking on the header cell of the desired variable column in the data window

#### Save and reuse graph templates

In the graph edit dialogue box select 'template' and save your graph as template file. You can apply this template to all graphs of the same type, e.g. a scatterplot template can only be applied to scatterplots. Until now, templates are not stored in the database, they are active only during your current session. However, subscribers can save an output with graphs and reuse the graphs as templates in later sessions.

#### 2015-06-04

Brightstat works best (and fastest) on desktop computers with google Chrome™ or Safari® web browser.

#### 2015-05-21

Click here to go to brightstat's web application open a sample data file and test it right away (no login required)

#### 2015-05-14

If you happen to be a statistician and if you happen to have identical twins, don't forget to put one in the control group.

#### 2015-05-07

You can add Brightstat's web application to the homescreen of any smartphone or tablet. (see also here)

#### 2015-04-30

A period (.) denotes a missing value in Brightstat's web application.

#### 2015-04-22

On mobile devices:

Use swipe right and left for moving variables to the list of selected variables and back.

Use swipe up and down for moving variables up and down in the list of selected variables.