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day45 - 66 Days of Data

04 Flow Variables

Exercise for creating and using flow variables.

Use a flow variable to customize the workflow based on the output of a previous node.

Exercise: Flow VariablesRead the JoinedCountryTable.table file by executing the Table Reader node. This table containsinformation about the demographics, geolocation, and travel risks in the different countries/territoriesin 2020.1.1) Let's look for the northmost country or territory in the data. Calculate first the maximum latitudevalue in the data.1.2) Transform it into a flow variable1.3) Filter the data by this flow variable to the northmost country. Use the Rule-based Row Filter node.Which country is it? JoinedCountryData.tablecalc northmost latitudecreatemaxLatitudeflow variablefilter for the north most countryin the data setdelete"Iceland"Table Reader Math Formula Table Rowto Variable Row Filter Row Filter Exercise: Flow VariablesRead the JoinedCountryTable.table file by executing the Table Reader node. This table containsinformation about the demographics, geolocation, and travel risks in the different countries/territoriesin 2020.1.1) Let's look for the northmost country or territory in the data. Calculate first the maximum latitudevalue in the data.1.2) Transform it into a flow variable1.3) Filter the data by this flow variable to the northmost country. Use the Rule-based Row Filter node.Which country is it? JoinedCountryData.tablecalc northmostlatitudecreatemaxLatitudeflow variablefilter for the north most countryin the data setdelete"Iceland"Table Reader Math Formula Table Rowto Variable Row Filter Row Filter

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Created by: Maarit Laukkanen
Created at: 2020-10-23
On NodePit since: 2022-10-24
Last update: 2024-11-23
Created with KNIME version: v4.7.2
Tags: flow variabletable row to variable

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