March R. Smith - University of St Thomas - Minnesota QMCS 130: Today’s Class Vectors and DimensionsVectors and Dimensions Scripts (shell scripts)Scripts (shell scripts) Import/Export of numerical matricesImport/Export of numerical matrices Working with parts of matricesWorking with parts of matrices Matlab #3: Exercise 5.1Matlab #3: Exercise 5.1

March R. Smith - University of St Thomas - Minnesota Vectors and Dimensions # of people in a house (village vector)# of people in a house (village vector) Rows versus columnsRows versus columns Mixed math:Mixed math: –Scalar > < Vector –Vector > < Vector TransposeTranspose Adding and removing ([] and ‘end’)Adding and removing ([] and ‘end’) find() – indices of booleans that are ‘true’find() – indices of booleans that are ‘true’

March R. Smith - University of St Thomas - Minnesota Scripts Just save a series of Matlab commands in a fileJust save a series of Matlab commands in a file Give it a.m suffixGive it a.m suffix Refer to it by name inside Matlab as a ‘command’Refer to it by name inside Matlab as a ‘command’ Use % as comment marker (like //)Use % as comment marker (like //) Functions are different – we’ll get to that laterFunctions are different – we’ll get to that later

March R. Smith - University of St Thomas - Minnesota Import/Export of Matrices New population vectorNew population vector –Row 1 = #people in a house –Row 2-5 = four highest ages of people in a house Using Excel to type in a matrixUsing Excel to type in a matrix Using TextpadUsing Textpad Importing/ExportingImporting/Exporting

March R. Smith - University of St Thomas - Minnesota Parts of Matrices Try town(:,1), town(1,:), town(2:end,:)Try town(:,1), town(1,:), town(2:end,:)

March R. Smith - University of St Thomas - Minnesota Matlab #3 Exercise 5.1, p. 108Exercise 5.1, p me the script me the script

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