Hi all, Newbie alert. OK, I'm reading the help file using Ted's suggestion of ?read.csv or ?read.table, etc., and trying to understand exactly what R has created for me when I do the read.csv command. The overall header says read.table creates a 'data.frame', which is fine with me as it works, but throughout the help file I run into the words table, matrix, array and others. Are these just different names for the same thing? Or are they subsets of what R considers a 'data.frame'? Or something else? Maybe just a pointer to a good page in the help file that explains this would be helpful,if it exists?
The second question is about plotting one column from data set. I've used read.csv to read in somethign called PFA_VWAP. row.names, names and dim all return sensible values. The command PFA_VWAP_Equity<-PFA_VWAP[,10] seems to load the new variable with the right data for the equity curve, but how do I plot it? plot(PFA_VWAP_Equity) gives me a chart that doesn't make sense to me. Note however that the original values that make up column 10 were surrounded by quotes so I'm not sure how to tell what sort of data R thinks is in column 10. Is it numeric or text? I think it's integer from the last command. Console output is shown below. Thanks in advance for being gentle with a new user. I need to order a good book from Amazon I suppose. Recommendations? Cheers, Mark > row.names(PFA_VWAP) [1] "1" "2" "3" "4" "5" "6" "7" "8" "9" "10" "11" "12" "13" "14" "15" "16" "17" "18" [19] "19" "20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "30" "31" "32" "33" "34" "35" "36" [37] "37" "38" "39" "40" "41" "42" "43" "44" "45" "46" "47" "48" "49" "50" "51" "52" "53" "54" [55] "55" "56" "57" "58" "59" "60" "61" "62" "63" "64" "65" "66" "67" "68" "69" "70" "71" "72" [73] "73" "74" "75" "76" "77" "78" "79" "80" "81" "82" "83" "84" "85" "86" "87" "88" "89" "90" [91] "91" "92" "93" "94" "95" "96" "97" "98" "99" "100" "101" "102" "103" "104" "105" "106" "107" "108" [109] "109" "110" "111" "112" "113" "114" "115" "116" "117" "118" "119" "120" "121" "122" "123" "124" "125" "126" [127] "127" "128" "129" "130" "131" "132" "133" "134" "135" "136" "137" "138" "139" "140" "141" "142" "143" "144" [145] "145" "146" "147" "148" "149" "150" "151" "152" "153" "154" "155" "156" "157" "158" "159" "160" "161" "162" [163] "163" "164" "165" "166" "167" "168" "169" "170" "171" "172" "173" "174" "175" "176" "177" "178" "179" "180" [181] "181" "182" "183" "184" "185" "186" "187" "188" "189" "190" "191" "192" "193" "194" "195" "196" "197" "198" [199] "199" "200" "201" "202" "203" "204" "205" "206" "207" "208" "209" "210" "211" "212" "213" "214" "215" "216" [217] "217" "218" "219" "220" "221" "222" "223" "224" "225" "226" "227" "228" "229" "230" "231" "232" "233" "234" [235] "235" "236" "237" "238" "239" "240" "241" "242" "243" "244" "245" "246" "247" "248" "249" "250" "251" "252" [253] "253" "254" "255" "256" "257" "258" "259" "260" "261" "262" "263" "264" "265" "266" "267" "268" "269" "270" [271] "271" "272" "273" "274" "275" "276" "277" "278" "279" "280" "281" "282" "283" "284" "285" "286" "287" "288" [289] "289" "290" "291" "292" "293" "294" "295" "296" "297" "298" "299" "300" "301" "302" "303" "304" "305" "306" [307] "307" "308" "309" "310" "311" "312" "313" "314" "315" "316" "317" "318" "319" "320" "321" "322" "323" "324" [325] "325" "326" "327" > names(PFA_VWAP) [1] "TRADE" "MARK-SYS" "DATE/TIME" "PL/SIZE" "PS METHOD" "POS SIZE" "POS PL" [8] "DRAWDOWN" "DRAWDOWN(%)" "EQUITY" > dim(PFA_VWAP) [1] 327 10 > PFA_VWAP_Equity<-PFA_VWAP[,10] > PFA_VWAP_Equity [1] 9,854.00 10,728.00 10,952.00 10,326.00 10,390.00 10,274.00 10,638.00 10,012.00 10,126.00 10,570.00 10,664.00 [12] 11,408.00 11,152.00 11,366.00 11,410.00 10,784.00 11,188.00 10,562.00 10,766.00 11,330.00 10,704.00 10,608.00 [23] 10,812.00 10,186.00 10,300.00 10,044.00 10,028.00 10,072.00 10,006.00 9,870.00 9,794.00 9,748.00 10,002.00 [34] 8,996.00 9,520.00 9,604.00 10,398.00 10,752.00 10,956.00 11,020.00 11,794.00 11,168.00 11,612.00 11,666.00 [45] 11,040.00 10,414.00 10,338.00 10,002.00 9,826.00 9,200.00 9,804.00 10,638.00 10,412.00 10,466.00 9,840.00 [56] 10,404.00 10,508.00 10,872.00 11,156.00 10,030.00 9,404.00 8,778.00 8,722.00 9,016.00 9,340.00 10,034.00 [67] 9,558.00 9,392.00 9,526.00 9,870.00 9,244.00 9,498.00 9,472.00 9,116.00 9,170.00 8,854.00 8,348.00 [78] 7,952.00 8,006.00 8,270.00 8,164.00 8,048.00 8,012.00 8,236.00 8,410.00 8,194.00 8,298.00 8,572.00 [89] 8,636.00 8,350.00 8,354.00 8,348.00 9,122.00 8,846.00 9,940.00 9,994.00 9,368.00 10,292.00 10,186.00 [100] 11,280.00 11,374.00 10,828.00 10,982.00 11,226.00 10,600.00 11,174.00 13,078.00 13,312.00 15,046.00 15,030.00 [111] 15,554.00 16,008.00 15,382.00 14,756.00 14,660.00 15,614.00 14,988.00 15,082.00 15,276.00 15,700.00 15,974.00 [122] 15,548.00 14,922.00 14,296.00 14,640.00 14,764.00 15,238.00 15,232.00 16,416.00 16,650.00 16,024.00 15,398.00 [133] 15,872.00 15,246.00 15,490.00 14,864.00 15,778.00 15,632.00 16,496.00 17,320.00 16,694.00 16,068.00 16,512.00 [144] 16,646.00 17,450.00 18,104.00 18,708.00 19,032.00 19,606.00 19,880.00 19,734.00 19,108.00 20,492.00 21,816.00 [155] 22,280.00 22,554.00 21,928.00 21,302.00 21,396.00 21,670.00 21,944.00 22,378.00 23,692.00 24,036.00 23,750.00 [166] 23,674.00 23,488.00 22,862.00 23,816.00 24,620.00 24,494.00 24,878.00 25,552.00 24,926.00 24,300.00 24,364.00 [177] 24,608.00 23,982.00 24,086.00 23,460.00 23,554.00 22,928.00 23,492.00 22,866.00 22,760.00 23,344.00 24,618.00 [188] 24,982.00 24,976.00 25,280.00 25,744.00 25,118.00 25,112.00 25,336.00 25,830.00 26,364.00 27,958.00 28,232.00 [199] 30,166.00 29,540.00 29,234.00 30,588.00 29,962.00 30,586.00 30,370.00 30,844.00 30,818.00 30,192.00 29,066.00 [210] 30,420.00 30,264.00 31,158.00 31,212.00 31,736.00 31,820.00 32,144.00 31,518.00 31,932.00 31,906.00 31,280.00 [221] 32,034.00 31,748.00 32,672.00 33,136.00 33,490.00 33,494.00 33,768.00 33,142.00 33,346.00 32,720.00 32,744.00 [232] 33,458.00 33,532.00 33,606.00 33,800.00 33,934.00 33,308.00 33,282.00 33,656.00 34,160.00 35,954.00 36,558.00 [243] 36,542.00 35,716.00 36,820.00 37,324.00 37,038.00 37,582.00 40,086.00 40,910.00 41,414.00 41,258.00 41,992.00 [254] 42,146.00 41,520.00 40,834.00 40,208.00 39,582.00 40,416.00 42,720.00 42,094.00 43,328.00 42,702.00 45,546.00 [265] 45,670.00 45,044.00 48,018.00 47,402.00 47,416.00 46,880.00 49,854.00 50,058.00 53,032.00 53,166.00 54,040.00 [276] 53,424.00 53,408.00 52,832.00 52,286.00 52,270.00 51,764.00 51,768.00 51,272.00 50,766.00 50,810.00 50,914.00 [287] 50,358.00 50,352.00 49,826.00 50,330.00 50,404.00 50,468.00 51,052.00 52,006.00 52,460.00 52,464.00 51,558.00 [298] 51,532.00 51,536.00 51,540.00 51,964.00 52,018.00 52,132.00 52,076.00 54,150.00 55,954.00 55,468.00 57,772.00 [309] 57,816.00 57,330.00 57,314.00 58,428.00 57,912.00 57,376.00 58,080.00 58,084.00 58,338.00 57,752.00 57,276.00 [320] 57,310.00 56,304.00 56,498.00 55,892.00 56,446.00 56,920.00 57,004.00 56,648.00 322 Levels: 10,002.00 10,006.00 10,012.00 10,028.00 10,030.00 10,034.00 10,044.00 10,072.00 10,126.00 ... 9,994.00 > > typeof(PFA_VWAP) [1] "list" > typeof(PFA_VWAP[,10]) [1] "integer" > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
