Tableau woes

I successfully uploaded my data into Tableau from Excel, but when I tried to transfer the information into the graphic, the data did not line up properly. “Abc”s appeared in many cells. What does this mean and how do I fix it?

Thursday Sept 22

Important Event next Tuesday and Extra Credit Opportunity: https://wordpressua.uark.edu/datareporting/ethics-summit-2-p-m-tuesday-sept-29/ Continue with Tableau https://public.tableau.com/s/ -Video http://www.tableau.com/learn/tutorials/on-demand/getting-started...

Ethics Summit 2 p.m. Tuesday Sept. 27

See this event next Tuesday. I’m offering extra credit if I see you at the event and if you then you write up a 300 word report about the event for the class blog. I will raise your worst quiz score by two full grade points (so a C+ becomes an A+; a D becomes a...