Texas Instruments voyage 200 User Manual - Page 882
subMat, Sum Sigma, switch, or bottom.
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subMat() CATALOG subMat(matrix1[, startRow] [, startCol] [, endRow] [, endCol]) ⇒ matrix Returns the specified submatrix of matrix1. Defaults: startRow=1, startCol=1, endRow=last row, endCol=last column. [1,2,3;4,5,6;7,8,9]! m1 ¸ subMat(m1,2,1,3,2) ¸ subMat(m1,2,2) ¸ 14 2 5 36 7 8 9 [47 58] [58 69] Sum (Sigma) See G(), page 908. sum( ) MATH/List menu sum(list[, start[, end]]) ⇒ expression sum({1,2,3,4,5}) ¸ 15 Returns the sum of the elements in list. sum({a,2a,3a}) ¸ 6ø a Start and end are optional. They specify a range of sum(seq(n,n,1,10)) ¸ 55 elements. sum({1,3,5,7,9},3) ¸ 21 sum(matrix1[, start[, end]]) ⇒ matrix sum([1,2,3;4,5,6]) ¸ [5 7 9] Returns a row vector containing the sums of the sum([1,2,3;4,5,6;7,8,9]) ¸ elements in the columns in matrix1. [12 15 18] Start and end are optional. They specify a range of rows. sum([1,2,3;4,5,6;7,8,9],2,3) ¸ [11,13,15] switch() CATALOG switch([integer1]) ⇒ integer Returns the number of the active window. Also can set the active window. Note: Window 1 is left or top; Window 2 is right or bottom. If integer1 = 0, returns the active window number. switch() ¸ If integer1 = 1, activates window 1 and returns the previously active window number. If integer1 = 2, activates window 2 and returns the previously active window number. If integer1 is omitted, switches windows and returns the previously active window number. integer1 is ignored if the TI-89 Titanium/Voyage™ 200 is not displaying a split screen. 884 Appendix A: Functions and Instructions
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