You can not get a direct graph for I vs. R in Multisim through the analysis, the parameter sweep you mentioned should give you the result but you do have to export the data to Excel. The work around use the voltage control resistor and by using DC sweep, you should be able to get the graph you are looking for. You can find the voltage control resistor is the “Basic virtual” family.
The attached circuit, I have set everything up for the DC sweep.
Tien - many thanks! You have perfectly answered my questions and provided a very useful tool.
All the best,