How to access a data element of a CSV file?

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I have a CSV file as my data set. I am using this code below to load it :

var dataset = d3.csv("mydata.csv");

My question is how I can have access to the elements inside the dataset var. As I checked, dataset variable is an object. Imagine I need the data element in row 4 and column 7, how can I get that piece of data?

asked 46 secs ago

sara_123

48