[R-SIG-Finance] smoothing quarterly data and extract data on each day

[袁振飞]

Hi, everybody

I have a quarterly zoo object named "dat1" as below. xyplot(dat1) and xyplot(dat1,type="smooth") may 
obtain both original and smoothed plot, and these two plots are just what I need, however I also
need those smoothed values on each day, and I have no idea how to extract from the smoothed curve.
I think there must be some convinent way to deal with this kind of problem. Anyone knows about it?

Thanks a lot!

> dat1
X1       X2       X3       X4        X5
2008 Q1 3482.858 1250.236 3548.769 4931.883  497.3590
2008 Q2 3531.582 1355.288 3645.622 5054.060  524.8273
2008 Q3 3783.050 1380.224 3719.840 4827.296  626.0529
2008 Q4 4372.995 1565.386 3827.486 5014.124  769.9170
2009 Q1 4485.311 1778.264 4486.163 5759.063  891.0500
2009 Q2 4506.971 1920.969 4704.324 6026.117  934.0728
2009 Q3 4791.432 1904.100 4837.732 6101.084  884.6493
2009 Q4 5393.146 1917.826 4971.702 6178.358  888.6124
2010 Q1 5377.333 2034.175 5222.298 6620.797  918.8237
2010 Q2 5651.565 2117.686 5273.992 6789.510  964.9723
2010 Q3 5905.428 2138.144 5382.343 6959.202 1107.4141
2010 Q4 6420.900 2248.762 5485.862 7003.115 1228.2340
2011 Q1 6595.900 2328.679 5745.658 7567.216 1284.2346
2011 Q2 6679.854 2474.070 5973.663 7920.905 1430.5884
2011 Q3 6523.676 2473.112 6016.118 8057.043 1479.7814
2011 Q4 7195.303 2632.994 6337.770 8259.334 1582.4205
2012 Q1 7137.809 2824.209 6950.471 8969.470 1647.5123
2012 Q2 7084.198 2989.912 6997.699 9314.090 1798.0352



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Zhenfei Yuan <zfyuan at mail.ustc.edu.cn>