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Simplest thing to do is to turn osnap on, and choose "snap to perpendicular." That should work. I am unfamiliar with the lisps you referred to, so at this time, it would appear that I'm stuck with your suggestion unless someone comes along with another and/or I get the time to learn about lisps.ĭo you know what angle your original line is at? If so, add or subtract 90 and adjust the angle in the formula. When I try your procedure, I get a line drawn at 90 degrees vertical, not perp to my original line.Ĭontributor V, I tried your method and it does work, although it seems a rather convoluted way to achieve what should be a simple task. You will have to move the drawn line to the point you want it to be from. You can draw the perpendicular line from line if you use this sequence of commands: LINE, PERP (select line), click somewhere on the side where you want the line to be drawn. Use UCS> NEW> OBJECT then BACK to UCS World I think the above solution works only if you will temporarily assign the UCS to the OBJECT (the line from). The way I do this is to select the line command, and when it asks for the first point, I choose my coordinates or snap (endpoint, etc.), then type in the to AutoCAD. This is too much effort to accomplish what should be a very simple thing. The only way I've been able to do this is to offset a line parallel to the existing line and then draw perp to the offset line. I want to draw a line starting on (nearest, end pt, mid pt snaps) the existing line and perpendicular to the existing line. I am starting with an existing line of some angle.
Autocad lisp least square method formula code#
Include file (to make the code reusable easily) named polifitgsl.We switched cad programs about 6 months ago to ACAD and have been unable to replicate the process of creating a particular perpendicular line with ACAD.
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\ sum_y, sum_xy, sum_x2y, sum_x3y, sum_x4y, sum_x5y The code listed below is good for up to 10000 data pointsĪnd fits an order-5 polynomial, so the test data for this taskĭIM x(Max%), x2(Max%), x3(Max%), x4(Max%), x5(Max%)ĭIM 圆(Max%), x7(Max%), x8(Max%), x9(Max%), x10(Max%)ĭIM y(Max%), xy(Max%), x2y(Max%), x3y(Max%), x4y(Max%), x5y(Max%) Return "y = " c "x^2" " + " b "x + " a "`n`n" resultĮxamples: xa := Result := "Input`tApproximation`nx y`ty1`n" IF x > 0 AND NOT empty THEN print ( "+" ) FI PROC print polynomial = (VEC x ) VOID : ( Out := lu solve (b, lu, p, a ) ]įIELD a # the plane # OP / = (MAT a, MAT b )MAT : ( # matrix division #įIELD lu = lu decomp (b, p, sign ) OP / = (VEC a, MAT b )VEC : ( # vector division # IF 2 LWB a /= LWB b OR 2 UPB a /= UPB b THEN raise index error FI įOR k FROM LWB result TO UPB result DO result :=a *b OD OP * = (MAT a, b )MAT : ( # overload matrix times matrix #įIELD result OP * = (VEC a, MAT b )VEC : ( # overload vector times matrix #įOR j FROM 2 LWB b TO 2 UPB b DO result :=a *b OD IF LWB a /= LWB b OR UPB a /= UPB b THEN raise index error FI įOR i FROM LWB a TO UPB a DO result +:= a *b OD OP * = (VEC a ,b )FIELD : ( # basically the dot product #
Autocad lisp least square method formula zip#
OP ZIP = ( FIELD in ) FIELD : (įIELD out Works with: ALGOL 68G version Any - tested with release mk15-0.8b.fc9.i386 MODE FIELD = REAL
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Constraint_Error is propagated when dimensions of X and Y differ or else when the problem is ill-defined. Then the linear problem AA T c=A y is solved. The function Fit implements least squares approximation of a function defined in the points as specified by the arrays x i and y i. Return Solve (A * Transpose (A ), A * Y ) Real_Arrays įunction Fit (X, Y : Real_Vector N : Positive ) return Real_Vector isĪ : Real_Matrix ( 0.