資源簡介
以美國某氣象站1894~2010年連續的年降水量為例,試應用小波分析,完成如下任務:①小波變換系數;②繪制小波系數實部等值線圖;③繪制小波系數模和模方等值線圖;④繪制小波方差圖;以及⑤繪制不同時間尺度的小波實部過程線。所謂年降水量時間序列的多時間尺度是指:年降水量在演化過程中,并不存在真正意義上的變化周期,而是其變化周期隨著研究尺度的不同而發生相應的變化,這種變化一般表現為小時間尺度的變化周期往往嵌套在大尺度的變化周期之中。也就是說,年降水量變化在時間域中存在多層次的時間尺度結構和局部變化特征。Details: http://blog.sciencenet.cn/blog-1148346-794768.html

代碼片段和文件信息
%?Created?by?LI?Xu
%?15?May?2014
%?Version?1.0
%?Retrieve?the?entended?numer?ahead?and?tail
function?[st?ed]=entendvalue(ShortArr?LongArr)
%?ShortArr=Prec;
%?LongArr=ePrec;
num_match=length(ShortArr);
num_matched=length(LongArr);
for?ii=1:num_matched-num_match+1
????a=(ShortArr==LongArr(ii:ii+num_match-1));
????count_same=sum(a);
????if?count_same==num_match
????????st=ii;
????????ed=ii+num_match-1;
????????fprintf(‘Original?Arrary:%d~%d\n‘?st?ed);
????????break;
????end
end
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????102984??2015-03-23?09:39??WavletAnalysis\6_var.jpg
?????文件?????126349??2014-05-15?10:11??WavletAnalysis\cePrec.mat
?????文件????????532??2014-05-15?09:52??WavletAnalysis\entendvalue.m
?????文件????????734??2014-05-15?09:24??WavletAnalysis\ePrec.mat
?????文件???????1133??2014-05-15?16:47??WavletAnalysis\LI_contourf.m
?????文件???????1047??2014-05-15?20:39??WavletAnalysis\LI_period_plot.asv
?????文件????????630??2014-05-15?20:40??WavletAnalysis\LI_period_plot.m
?????文件????????889??2014-05-15?15:19??WavletAnalysis\LI_plot.m
?????文件????????369??2014-05-15?17:06??WavletAnalysis\LI_Var.m
?????文件???????2526??2014-05-15?20:39??WavletAnalysis\main.asv
?????文件???????3262??2015-03-23?09:37??WavletAnalysis\main.m
?????文件??????41975??2014-05-15?15:50??WavletAnalysis\pictures\0_trend.png
?????文件?????147343??2014-05-15?09:20??WavletAnalysis\pictures\1.png
?????文件?????204914??2014-05-15?10:10??WavletAnalysis\pictures\2.png
?????文件?????513234??2014-05-15?21:03??WavletAnalysis\pictures\3_real_contourf.jpg
?????文件?????457762??2014-05-15?21:05??WavletAnalysis\pictures\4_mod_contourf.jpg
?????文件?????456891??2014-05-15?21:05??WavletAnalysis\pictures\5_mod_square_contourf.jpg
?????文件?????115342??2014-05-15?21:06??WavletAnalysis\pictures\7_55a_coefficient.jpg
?????文件?????131500??2014-05-15?21:06??WavletAnalysis\pictures\8_30a_coefficient.jpg
?????文件????????718??2014-05-15?08:47??WavletAnalysis\Prec.mat
?????文件????????363??2014-05-15?08:48??WavletAnalysis\Year.mat
?????目錄??????????0??2015-03-23?09:39??WavletAnalysis\pictures
?????目錄??????????0??2015-03-23?09:39??WavletAnalysis
-----------?---------??----------?-----??----
??????????????2310497????????????????????23
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