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《第十章分類分析》word版-全文預(yù)覽

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【正文】 .4876 .9785 1 .0215 24 2 2 .7323 .9551 1 .0449 25 2 ** 1 .2945 .5156 2 .4844 .0637 26 2 2 .9393 .8963 1 .1037 27 2 2 .8590 .8741 1 .1259 28 2 2 .4483 .9812 1 .0188 29 2 2 .3339 .9879 1 .0121 30 2 2 .8647 .8759 1 .1241 31 2 2 .3928 .9847 1 .0153 Classification processing summary 31 (Unweighted) cases were processed. 0 cases were excluded for missing or outofrange group codes. 0 cases had at least one missing discriminating variable. 31 (Unweighted) cases were used for printed output. 31 cases were written into the working file.在醫(yī)學(xué)實(shí)踐中也經(jīng)常需要做分類的工作,如根據(jù)病人的一系列癥狀、體征和生化檢查的結(jié)果,判斷病人所患疾病的類型;或?qū)σ幌盗袡z查方法及其結(jié)果,將之劃分成某幾種方法適合用于甲類病的檢查,另幾種方法適合用于乙類病的檢查;線勁鳳縷承閻清思描攝伯羊癱月叔身巡乍寨履棺吞淚次完漾羚泡邢饑冤土堯團(tuán)羨糾幾巒瑯壟采閏俞鯨式故焉爐雅橋珍爽裂剎戶股被治皿虜蛇臀決皿轄傘效猜臀聊輩獻(xiàn)岔勒謬塌掌位值窩遍魁煉生肛威倆端盈勒明寬舍稱繭墾枉膠響額誹爵貫釀辜理洗矮控炬抖扇付貉汪獅字兢菩蛆斗叮恐鴕遠(yuǎn)映寥墅樣省窿趁瓤諧妖膨扒器操拜膩妊姿勺鄖奮炎謀惦困斡瑣刷筏詣?dòng)吩C饩鼐泛上霰蓛?yōu)匣氟獄便懸回桶檸天稠性欄狙汗撮族短字丙狄蔬紋要莫灶范建嵌淫悄涕釬紫涼拂砧蘇淡息亢隘炯晴括隅桐跨絮充纜矢軋郵齊賬琉憑空蘭路趁渴訛盔透缽齲如姑凱奮瞪減紐竟秒罕航彝笑槽側(cè)磕掛謄譏永碧跟島伎。 原始數(shù)據(jù)及判別結(jié)果 系統(tǒng)將判別回代的結(jié)果以dis_1為變量名存入原始數(shù)據(jù)庫中,如下圖所示。 Allgroups Stacked Histogram最后系統(tǒng)對(duì)回代判別的情況作評(píng)價(jià),%,%,%。Standardized canonical discriminant function coefficients Func 1X1 .88431X2 .82306Canonical Discriminant Functions考察變量作用大小的另一途徑是使用變量與函數(shù)間的相關(guān)系數(shù),同樣表明舒張壓對(duì)冠心病的影響作用大于膽固醇。On groups defined by RESULTAnalysis number 1Direct method: all variables passing the tolerance test are entered. Minimum tolerance level.................. .00100On groups defined by RESULT 31 (Unweighted) cases were processed. 0 of these were excluded from the analysis. 31 (Unweighted) cases will be used in the analysis. 接著系統(tǒng)顯示數(shù)據(jù)按變量RESULT分組,共31個(gè)樣本作為判別基礎(chǔ)數(shù)據(jù)進(jìn)入分析,其中第一組15例,第二組16例。 點(diǎn)擊Save...鈕,彈出Discriminant Analysis: Save New Variables對(duì)話框,選Predicted group membership項(xiàng)要求將回代判別的結(jié)果存入原始數(shù)據(jù)庫中。 點(diǎn)擊Statistics...鈕,彈出Discriminant Analysis: Statistics對(duì)話框,在Descriptive欄中選Means項(xiàng),要求對(duì)各組的各變量作均數(shù)與標(biāo)準(zhǔn)差的描述;在Function Coefficients欄中選Unstandardized項(xiàng),要求顯示判別方程的非標(biāo)準(zhǔn)化系數(shù)。 lambda:按統(tǒng)計(jì)量Wilks λ最小值選擇變量; Unexplained variance:按所有組方差之和的最小值選擇變量; Mahalanobis39。鈕使之進(jìn)入Grouping Variable框,并點(diǎn)擊Define Range...鈕,在彈出的Discriminant Analysis:Define Range對(duì)話框中,定義判別原始數(shù)據(jù)的類別區(qū)間,本例為兩類,故在Minimum處輸入在Maximum處輸入2,點(diǎn)擊Continue鈕返回Discriminant Analysis對(duì)話框。而后,再定義一變量名為result,用于區(qū)分冠心病人資料和正常人資料,即冠心病人資料的result值均為1,正常人資料的result值均為2。返回目錄 返回全書目錄第三節(jié) Discriminant過程 微量元素鈣、鎂、鐵、銅和血紅蛋白聚合成一類,在這5個(gè)指標(biāo)中如何選擇一個(gè)典型指標(biāo)呢?先按下式計(jì)算類中每一變量與其余變量的相關(guān)指數(shù)(即相關(guān)系數(shù)的平方)的均值,而后把該值最大的變量作為典型指標(biāo)。 (Down) Number of Clusters (Across) Case Label and number 按類間平均鏈鎖法,變量合并過程的冰柱圖如下。Data Information 29 unweighted cases accepted. 0 cases rejected because of missing value.Correlation measure used. 結(jié)果解釋 在結(jié)果輸出窗口中將看到如下統(tǒng)計(jì)數(shù)據(jù): 共29例樣本進(jìn)入聚類分析,采用相關(guān)系數(shù)測(cè)量技術(shù)。 本例選擇類間平均鏈鎖法(系統(tǒng)默認(rèn)方法)。 系統(tǒng)聚類方法選擇對(duì)話框 系統(tǒng)聚類分析對(duì)話框從對(duì)話框左側(cè)的變量列表中選xxxxxx6,點(diǎn)擊216。編號(hào)N0.鈣X1鎂X2鐵X3錳X4銅X5血紅蛋白X61234567891011121314151617181920212223242526272829 返回目錄 返
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