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大家好!我这里有一组离散数据(收缩压)150个,每个数据之间的时间间隔是15分钟,请问如何在HHT谱上获得真实频率?另外我处理后发现频谱比较模糊,是什么原因呢?
数据如下:
sig=[158,149,136,133,157,139,141,133,148,132,128,132,131,143,143,131,134,128,136,141,132,133,134,128,129,127,152,139,141,142,140,128,125,133,133,122,113,126,146,149,145,138,141,137,156,120,125,144,134,137,127,122,121,122,130,127,128,137,115,113,120,109,100,117,107,122,96,107,119,120,128,132,131,130,141,135,147,140,139,149,134,146,131,128,121,126,119,130,121,130,128,114,114,123,111,124,128,125,107,112,158,127,108,118,120,115,122,122,121,128,128,117,119,127,126,119,133,125,135,128,136,130,137,129,120,134,133,130,117,111,116,92,107,104,94,111,113,116,114,108,115,106,110,111,114,132,128,135,133,131]; |