If const is FALSE, b is set equal to 0 (zero), and the m-values are adjusted so that y = mx. I have added a linear trendline to the chart and displayed the equation. If const is TRUE or omitted, b is calculated normally. Trendline with date axis I am using a line chart with a dated x axis and numeric y axis. If known_x's is omitted, it is assumed to be the array that is the same size as known_y's.Ī logical value specifying whether to force the constant b to equal 0 If more than one variable is used, known_y's must be a vector (that is, a range with a height of one row or a width of one column). If only one variable is used, known_y's and known_x's can be ranges of any shape, as long as they have equal dimensions. The array known_x's can include one or more sets of variables. If the array known_y's is in a single row, then each row of known_x's is interpreted as a separate variable.Īn optional set of x-values that you may already know in the relationship y = mx + b It fits a straight line (using the method of least squares) to the arrays knownys and knownxs. However, you can always take the equation for the trend line and calculate the data that comprise it, then create a new data set that adjusts for the slope of the trend line. If the array known_y's is in a single column, then each column of known_x's is interpreted as a separate variable. The TREND function returns values along a linear trend. excel charts trendline Share Improve this question Follow asked at 23:30 David Thielen 28k 34 115 190 2 No. The set of y-values you already know in the relationship y = mx + b The TREND function syntax has the following arguments:
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