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Nayland College - Mathematics

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NZAMT NZQA NZ Grapher NZ Maths Census at School Study It

3.8 Time Series HOME | Achievement Objectives | Overview | The Statistics Cycle
NZ Grapher: The best choice | iNZight: Getting Started , Importing Data
Using EXCEL: Smoothing, Trend, Seasonal Effects, Graphing, Forecasts, Seasonal Adjustment, Non-Linear models, Comparing Excel & iNZight
Report Writing: Summary | Introduction | Trend | Decompose | Recompose | Seasonal Effect | Forecasts | Robustness | Additive vs Multiplicative model | Comparing | Combining | Conclusion | Practice Assessment

Loading Data into iNZight

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Data and iNZight

iNZight is sensitive to data errors.

REMEMBER: If you upload your own data it MUST be in a .csv file, with correct time and variable notation, no commas, no variable definitions etc

Notice the time intervals
1990 = year
M01 = month1
M02 = month2

How to handle two monthly data (or other time increments) or when your data has a 'hole in it'

 

iNZight free download and videos on how to get started 

 

Input Data

 

Input Data

Browse for a file

 

 

Browse for a file

REMEMBER: If you upload your own data it MUST be in a .csv file, with correct time and variable notation, no commas, no variable definitions etc

Tips on iNZight files and variables - link to doc by Rachel Passmore

 

Lets start with the 'Sea Ice' example so go to 'data'

 

then the 'time-series' folder

 

then select 'Sea Ice'

 

then

Once loaded your data should look like this:

Notice the time intervals

1990 = year
M01 = month1
M02 = month2

 

How to handle two monthly data (or other time increments)

 

Data like this was recorded every two months.

 

When you upload the data and go 'advanced' and 'time series' you get this warning...

Don't panic, just OK then click the 'Provide time info'

Start date (obvious)

Season Number - the season when the data starts (01 if the data starts in Jan)

Frequency - the number of data values per cycle/year/month/week

Then select your variable and continue your analysis.

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