[問題] 關於讀取ascii檔已回收
手邊有一個ascii檔案,是有標頭還有數字混合的
長的像下面這樣
# RADS_ASC
# Satellite = TOPEX
# Phase = a
# Cycle = 328
# Pass = 0001
# Col 1 = time rel. to equator passage [s]
# Col 2 = latitude [degrees_north]
# Col 3 = longitude [degrees_east]
# Col 4 = sea level anomaly [m]
-1679.238556 -66.142208 17.951287 NaN
-1674.908883 -66.137585 18.501359 NaN
-1673.826458 -66.136103 18.638842 NaN
-1659.766403 -66.105038 20.422566 0.02
-1658.680924 -66.101728 20.560062 NaN
-1657.595438 -66.098288 20.697521 NaN
......
我只需要底下那串n列4行的數據(包含NAN)
請問要用什麼指令可以取出底下的[1:n,4]矩陣?
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03/31 20:37, , 1F
03/31 20:37, 1F