• 제목/요약/키워드: Biplot

검색결과 54건 처리시간 0.022초

유전자검사자료의 통계분석을 위한 수량화 및 그래프 방법 (Quantification and Graphical Method for DNA Fingerprinting)

  • 박미라
    • 응용통계연구
    • /
    • 제15권1호
    • /
    • pp.85-105
    • /
    • 2002
  • 본 연구에서는 유전자 검사자료에서 각 유전자좌내 및 유전자좌간의 대립형질들간의 관계를 파악하기 위한 탐색적 방법을 고려하였다. 이를 위해 유전자데이터를 재배열한 후 대응분석 및 다중대응분석의 알고리즘을 적용하여 이를 수량화, 그래프화하는 방법 및 대응행렬도를 적용한 방법을 제안하였다 이러 한 수량화 및 그래프 결과가 하디-와인버그 평형검정 및 연관균형검정 결과와 어떤 관계가 있는지 알아보고 실제 한국인 집단에 대한 STR 유전자좌 자료를 이용하여 결과를 비교하였다.

대학병원의 시장경쟁력 강화를 위한 리포지셔닝에 관한 연구 (A Study on the Repositioning for Strengthening University Hospitals Competitiveness)

  • 송만석;윤기호
    • 한국병원경영학회지
    • /
    • 제22권3호
    • /
    • pp.105-117
    • /
    • 2017
  • This study was performed to provide medical service providers with useful information for their market competitiveness and decision making. It is regarding positioning map and repositioning map strategy to enforce market competitiveness through bench marking of a specific hospital which has been relatively underestimated in the market. With AHP and biplot analyses for this study, we could identify priority of properties that medical service consumers consider when they choose a university hospital and market competitiveness of alternative university hospitals. It is expected that the study of repositioning strategy to Strengthening Market Competitiveness will provide efficient problem solving method to allocation restricted resources by repositioning the specific university hospital through benchmarking with evaluation factors of the most market competitiveness university hospital. When Inje University Paik Hospital was benchmarked and repositioned, the share of Paik hospital increased and there was only 3.1% difference from Dongah Dong-A University Hospital, which occupied the first place in market competitiveness. Such the results of this study may suggestion management strategies to provide efficient problem solving methods when companies responding to rapidly changing management environments allocation restricted resources.

생태학의 통계적 서열화 방법 비교에 관한 연구 (A Comparison Study for Ordination Methods in Ecology)

  • 고현석;전명식;정형철
    • 응용통계연구
    • /
    • 제28권1호
    • /
    • pp.49-60
    • /
    • 2015
  • 군생태학에서 종, 장소 그리고 환경변수의 관계를 시각적으로 보기 위해 대응분석, 정준대응분석 등 다양한 서열화방법들을 사용한다. Ter Braak (1986), Jackson 등 (1991), Parmer (1993) 등은 고유값 및 거리그래프를 이용하여 서열화방법들을 비교하고 있는데, 이 방법들은 조사된 데이터에 근거하고 있기 때문에, 모집단과 행렬도의 관계를 보여주지는 못한다. 따라서, 본 논문에서는 행렬도에 모집단 정보의 표현정도를 측정하는 방법을 소개하고, 이를 활용하여 서열화방법들을 객관적으로 비교하였다. 비교결과, 정준대응분석은 대응분석과 유사한 정분류율을 유지하면서도 환경정보를 이차원 공간에 표현할 수 있는 장점을 지닌 분석임을 확인하였다.

Quantification Plots for Several Sets of Variables

  • Park, Mira;Huh, Myung-Hoe
    • Journal of the Korean Statistical Society
    • /
    • 제25권4호
    • /
    • pp.589-601
    • /
    • 1996
  • Geometric approach to extend the classical two-set theory of canonical correlation analysis to three or more sets is considered. It provides statistical graphs to represent the data in a low dimensional space. Procedures are developed for computing the canonical variables and the corresponding properties are investigated. The solution is equivalent to that of the usual problem in the case of two sets. Goodness-of-fit of the proposed plots is studied and a numerical example is included.

  • PDF

Canonical Correlation Biplot

  • Park, Mi-Ra;Huh, Myung-Hoe
    • Communications for Statistical Applications and Methods
    • /
    • 제3권1호
    • /
    • pp.11-19
    • /
    • 1996
  • Canonical correlation analysis is a multivariate technique for identifying and quantifying the statistical relationship between two sets of variables. Like most multivariate techniques, the main objective of canonical correlation analysis is to reduce the dimensionality of the dataset. It would be particularly useful if high dimensional data can be represented in a low dimensional space. In this study, we will construct statistical graphs for paired sets of multivariate data. Specifically, plots of the observations as well as the variables are proposed. We discuss the geometric interpretation and goodness-of-fit of the proposed plots. We also provide a numerical example.

  • PDF

Arrow Diagrams for Kernel Principal Component Analysis

  • Huh, Myung-Hoe
    • Communications for Statistical Applications and Methods
    • /
    • 제20권3호
    • /
    • pp.175-184
    • /
    • 2013
  • Kernel principal component analysis(PCA) maps observations in nonlinear feature space to a reduced dimensional plane of principal components. We do not need to specify the feature space explicitly because the procedure uses the kernel trick. In this paper, we propose a graphical scheme to represent variables in the kernel principal component analysis. In addition, we propose an index for individual variables to measure the importance in the principal component plane.

패스트푸드 브랜드 개성에 따른 재포지셔닝 전략 (Repositioning Strategies Following Fast Food Brand Personality)

  • 김경희
    • 한국식생활문화학회지
    • /
    • 제31권2호
    • /
    • pp.121-130
    • /
    • 2016
  • This study attempted to understand the fast food brand personality in the domestic dining market to present the repositioning strategies within the competitive market. Positive analysis results were as follows. First, the five brand individualities of 'familiarity', 'passion', 'professionalism', 'reliability', and 'refinement' were derived. Second, the deductions made on perceptions of the population using a Biplot based on the brand personality showed that there were significant differences among the brand personality images of the brands, which were the targets of comparison. Third, there were significant between-group differences in the comparisons of perception among the subgroups according to gender, brand reliability, and brand satisfaction. Fourth, there were significant between-group differences in the consumer fast food brand preferences and ideal point. Such studies can provide information useful for establishing marketing differentiating strategies by grasping the brand personality of competing brands in the market.

교차 평가 모델의 고정 가중치 유형의 확장 연구 (Extensions on The Fixed Weighting Nature of Cross-Evaluation Model)

  • 최성균;양재경
    • 산업경영시스템학회지
    • /
    • 제35권1호
    • /
    • pp.188-197
    • /
    • 2012
  • DEA 모델중 널리 사용되는 교차평가모델(cross efficiency model)은 가중치에 제한을 두지 않고 어떤 특정분야에 탁월한 성과를 내는 DMU(Decision Making Unit)보다는 보다 전반적인 분야에서 두각을 나타내는 DMU를 선발함으로써 많은 연구자들이 DEA문헌에서 적용하여 왔다. 본 연구에서는 이러한 교차평가모델이 실제에 있어서는 암묵적으로 고정 가중치를 사용한다는 것과 동일한 결과를 나타낸다는 것을 분석적으로 밝혔다(one input, multi output case). 또한 multi-input, multi-output case의 경우에도 overall performer의 cluster에 근접한 대다수 DMU의 경우에는 고정 가중치를 사용한 경우와 거의 차이가 없음을 보였다. 교차평가 모델에 적용된 변수의 가중치를 보다 명확히 함으로써 연구자들이 모델의 평가결과를 이해하는데 도움이 될 수 있을 것이다. 또한 교차 평가의 가중치 도식을 더 명확히 보여주기 위해 biplot을 제안한다.

유전형과 재배환경의 상호작용에 따른 감자 수량성과 글리코알카로이드 함량 변화 (Genotype x Environment Interaction and Stability Analysis for Potato Performance and Glycoalkaloid Content in Korea)

  • 김수정;손황배;이유영;박민우;장동칠;권오근;박영은;홍수영;서종택;남정환;정진철;구본철;김율호
    • 한국작물학회지
    • /
    • 제62권4호
    • /
    • pp.333-345
    • /
    • 2017
  • 감자 6품종인 수미(SP), 대서(AT), 하령(HR), 고운(GU), 홍영(HY), 자영(JY)을 대상으로, 해발고도별로 재배환경이 다른 강릉(E1), 진부(E2), 대관령(E3) 지역에서 2012년과 2013년 재배하여 괴경 수량성과 글리코알카로이드(PGA) 함량을 평가하였다. 품종이 가지고 있는 유전적 특성은 품종 고유의 유전형(G)과 재배환경(E)과의 상호작용($G{\times}E$)을 거쳐 발현되므로 본 연구에서는 AMMI 모델과 GGE biplot 분석을 통해 지역별 수량성과 PGA 함량 변화 양상을 검토하였다. 1. 감자 수량은 재배환경과 상호작용이 차지하는 비율이 높고, PGA 함량은 유전형(품종)의 효과가 차지하는 비율이 높은 것으로 나타났다. 2. 지역별로 높은 수량을 나타내는데 적합한 품종으로 강릉에서 '수미', 진부에서 '고운', 대관령 에서 '하령'이었으며, 수량이 높으면서 생산 안정성을 보인 품종은 수미였다. 3. 지역별로 높은 PGA 함량을 보이는 품종으로 강릉에서 '하령', 진부에서 '대서', 대관령에서 '수미'이었으며, PGA 함량이 낮으면서 재배환경에 영향을 덜 받는 안정성이 뛰어난 품종은 '고운'이었다. 4. 감자 품종의 양적 농업 형질인 수량은 재배환경에 따라 차이를 보였으며, PGA 함량은 품종 고유의 형질 차이에 의해 다르게 나타났다. 5. 감자의 수량성을 확보하기 위해서는 재배 적지의 선정이 중요하고, PGA 함량을 낮추기 위해서는 저함유 품종 개발이 선행되어야 한다고 판단되었다.

중국 수출확대를 위한 한국 농식품 브랜드 아이덴티티 정립 (A Study of Korean Agri-Food Brand Identities for Expanding Exports to China)

  • 안욱현;조우철;김창환
    • 유통과학연구
    • /
    • 제12권2호
    • /
    • pp.7-16
    • /
    • 2014
  • Purpose - The purpose of this study is to target Chinese consumers of Korean agri-food through the analysis of agri-food brand identity images to set future directions for proposed agri-food exports to China. Since negotiations began for a free trade agreement (FTA) between Korea and China, some Koreans have worried about the Korean agriculture sector. The world trading system has undergone many changes in recent years. Since the start of FTA negotiations on agriculture, China and Korea have faced a heightened sense of crisis. China is trying to export agricultural products so actively that its agricultural exports could increase by more than 7% annually. China exported about one-tenth of its agricultural products to Korea in the period 2002-2010. Recently, the importance of brand identity has tended to increase, as the world becomes one unified market. In this situation, we should try to promote agri-food exports to China. It is very important to understand consumers' recognition of Korean food and the image of the Korean agri-food industry, to establish an export strategy. Research design, data, and methodology - This study targeted 2,800 adult men and women aged 25-59 years living in four major cities in China (Beijing, Shanghai, Guangzhou, and Qingdao) with a household income within the top 10% level in the China, using the one-to-one interview survey method. In addition, four groups by region (eight people per group) for a total of 32 groups were surveyed by using the focus group interview (FGI) research method, and impressions of imported agri-food were surveyed using 17 questions about fresh agri-food and 22 questions on processed agri-food. Factor analysis, brand positioning, biplot analysis, and so on, were carried out based on the results of these surveys. This research presents the brand identity of Korean food; according to the analyses, the brand identity is based on trust, safety, and attractiveness. Result - Factor analysis results showed that Chinese consumers expect four major qualities in imported fresh agri-food: freshness/safety, attractive appearance, premium branding, and excellent taste/quality. In the case of processed agri-food, it turned out that Chinese consumers are focused on safety/hygiene/freshness, health, and taste. In addition, in the fresh agri-food analysis by country, American foods had the upper hand; the image of American foods was also recognized as the most positive for processed agri-food. Meanwhile, according to the biplot analysis, Korean agri-food is strongly preferred for its appearance, but no country is strongly preferred as regards the level of freshness/safety that is expected by Chinese consumers. Conclusions - In this study, we analyzed the image of imported agri-food expected by Chinese consumers by reconstructing agri-food characteristics from the brand perspective. The research result shows that a Korean brand identity must be the ultimate goal for activities undertaken to enhance the image of Korean agri-food in the future. Additional research is needed because brand image can be formed through various channels.