add lesson post for ggplot
add lesson post for ggplot

sjeblee/studyGroup,QuLogic/studyGroup,QuLogic/studyGroup,linamnt/studyGroup,linamnt/studyGroup,sjeblee/studyGroup,lwjohnst86/studyGroup,sjeblee/studyGroup,mbonsma/studyGroup,QuLogic/studyGroup,sjeblee/studyGroup,linamnt/studyGroup,QuLogic/studyGroup,linamnt/studyGroup,mbonsma/studyGroup,lwjohnst86/studyGroup,mbonsma/studyGroup,thesarahmeister/studyGroup,linamnt/studyGroup,mbonsma/studyGroup,lwjohnst86/studyGroup,thesarahmeister/studyGroup,mbonsma/studyGroup,thesarahmeister/studyGroup,QuLogic/studyGroup,lwjohnst86/studyGroup,QuLogic/studyGroup,linamnt/studyGroup,sjeblee/studyGroup,lwjohnst86/studyGroup,mbonsma/studyGroup,thesarahmeister/studyGroup,thesarahmeister/studyGroup,sjeblee/studyGroup,thesarahmeister/studyGroup,thesarahmeister/studyGroup,lwjohnst86/studyGroup