(*^
::[ Information =
"This is a Mathematica Notebook file. It contains ASCII text, and can be
transferred by email, ftp, or other text-file transfer utility. It should
be read or edited using a copy of Mathematica or MathReader. If you
received this as email, use your mail application or copy/paste to save
everything from the line containing (*^ down to the line containing ^*)
into a plain text file. On some systems you may have to give the file a
name ending with ".ma" to allow Mathematica to recognize it as a Notebook.
The line below identifies what version of Mathematica created this file,
but it can be opened using any other version as well.";
FrontEndVersion = "Macintosh Mathematica Notebook Front End Version 2.2";
MacintoshStandardFontEncoding;
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fontset = input, noPageBreakInGroup, nowordwrap, preserveAspect, groupLikeInput, M42, N23, bold, L-5, 12, "Courier";
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fontset = info, inactive, noPageBreakInGroup, nowordwrap, preserveAspect, groupLikeOutput, M42, N23, B65535, L-5, 12, "Courier";
fontset = postscript, PostScript, formatAsPostScript, output, inactive, noPageBreakInGroup, nowordwrap, preserveAspect, groupLikeGraphics, M7, l34, w282, h287, 12, "Courier";
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paletteColors = 128; automaticGrouping; currentKernel;
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ClearAll;
$DefaultFont = {"Times-Roman",10};
Needs["Statistics`DataManipulation`"];
Needs["Graphics`Graphics`"];
times = {6,18,30,39,46,53,60,74,93};
weights = {1,4,9,17,26,42,62,71,74};
datapoints = Map[Thread,Transpose[{times,weights}]];
logdatapoints = Map[Thread,Transpose[{times,Log[weights]}]];
G[t_]:= Fit[Drop[Drop[logdatapoints,-2],1],{1,t},t];
W[t_]:= E^(Coefficient[G[t],t,0] +t Coefficient[G[t],t,1]);
uplot = Show[{ListPlot[logdatapoints,PlotRange->{{0,100},{0,4.4}},
AxesOrigin->{0,0},PlotLabel->
"(a) Log of weight of maize (gms) versus time (days)"],
Plot[G[t],{t,0,63.46},PlotStyle->Dashing[{0.001,0.01}]]}];
lplot = Show[{ListPlot[datapoints,PlotRange->{{0,100},{0,75}},
AxesOrigin->{0,0},PlotLabel->
"(b) Weight of maize (gms) versus time (days)"],
Plot[W[t],{t,0,62.2},PlotStyle->Dashing[{0.001,0.01}]]}];
Show[GraphicsArray[{{uplot},{lplot}}],PlotLabel->"Figure 29.1"]
^*)