<b>FactoMineR</b>: An<i>R</i>Package for Multivariate Analysis

Lê, Sébastien; Josse, Julie; Husson, François

doi:10.18637/jss.v025.i01

Cited by 7,730 publications

(4,700 citation statements)

References 7 publications

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“…All quantitative variables were transformed into categorical variables by defining classes, considered as meaningful on the basis of qualitative information collected during the survey and the resulting repartition of the total sample. A multiple correspondence factorial analysis (MCA) was performed on the 11 variables with the R package FactoMineR (Lê et al 2008). All variables with modalities showing insufficient contribution to the MCA axes (i.e.…”

Section: Resultsmentioning

confidence: 99%

Characterisation of camel breeding practices in the Ansongo Region, Mali

Traoré¹,

Moula²,

Touré³

et al. 2014

Trop Anim Health Prod

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Despite its importance in Mali's economy, camel breeding in the country remains poorly documented, impeding effective policy-making in this regard. This study consisted in a 3-month survey and aimed at characterising camel breeding systems in Ansongo, in the region of Gao, Mali. It highlights the diversity of strategies adopted by breeders and their evolutions. Supplementary feeding and veterinary care were seldom practised. In zones close to the Niger River, cattle were substituted to camels. Transhumance routes also are modified but mobility keeps its vital role in the breeding system. Important differences within the study region in the classification of camel breeds have been reported that will influence the implementation of a collective action for animal genetic improvement. The improvement goals should take the actual management, including mobility and the mixed nature of the herds into account.

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Section: Resultsmentioning

confidence: 99%

Characterisation of camel breeding practices in the Ansongo Region, Mali

Traoré¹,

Moula²,

Touré³

et al. 2014

Trop Anim Health Prod

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“…O software R v2.12.1 (IHAKA; GENTLEMAN, 1996) foi utilizado para realizar a ACP a partir da matriz de covariância das variáveis e para aplicar a técnica de agrupamento hierárquico baseada em componentes principais (HCPC), ambas funções do pacote FactoMineR (LÊ et al, 2008). Conforme recomenda McKenzie (2005), os histogramas das 30 variáveis padronizadas, como uma aproximação para suas funções densidade de probabilidade, foram observados, o que permitiu verificar a inexistência de potenciais problemas de clumping (agregado de grupos) e truncation (intervalos de valores que não permitem diferenciar grupos), que podem ser associados às análises exploratórias baseadas em ACP.…”

Section: Análise Dos Dadosunclassified

Comunidades ribeirinhas como forma socioespacial de expressão urbana na Amazônia: uma tipologia para a região do Baixo Tapajós (Pará-Brasil)

Amaral¹,

Dal’Asta²,

Brigatti³

et al. 2013

Rev. bras. estud. popul.

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O fenômeno urbano na Amazônia contemporânea se estende pelo território e se estrutura por diversas formas socioespaciais, tais como as comunidades locais, que, ao formarem redes urbanas incipientes, têm características particulares definindo sua importância na estruturação do território regional. Neste artigo, é proposto o uso de técnicas qualiquantitativas para definir uma tipologia para as comunidades ribeirinhas do Baixo Tapajós (Pará): variáveis descritoras, obtidas por questionários de campo aplicados a 62 comunidades, entre Santarém e Itaituba, e submetidas à estatística multivariada. A partir da análise de componentes principais para 30 variáveis e agrupamento hierárquico, cinco grupos de comunidades foram identificados e descritos; resultado considerado consistente com as observações de campo. Variáveis relacionadas principalmente ao uso da terra e à infraestrutura condicionaram esta classificação. Comunidades em unidades de conservação, independente da localização na margem do Rio Tapajós, apresentaram situação distinta das demais, sendo que a presença do Estado, suportando programas governamentais, mostrou-se fundamental para manutenção de todas as comunidades.

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“…We grouped the variables into six themes: (1) climate change perceptions, (2) crop species cultivated, (3) crop and variety richness, (4) crops perceived as susceptible to climate change stresses, (5) crops perceived as tolerant to climate change stresses, and (6) adaptation actions. The themes were balanced in the global analysis of the MFA, which weighs them by the inverse of the first eigenvalue of the separate analysis tables (Lê et al 2008). Additional variables were included in the analysis as supplementary information that did not contribute to the formation of the MFA axes or the clustering but which were correlated to the results.…”

Section: Resultsmentioning

confidence: 99%

“…Following a similar approach to that applied by Choisis et al (2012) to analyse farming system diversity, we performed hierarchical clustering on the first nine axes of the component scores of the MFA (which captured 50% of the variance) using Ward's criterion. The analysis was performed using the FactoMineR package (Lê et al 2008) in the R environment (R version 3.03; R Development Core Team 2008).…”

Section: Resultsmentioning

confidence: 99%

Climate change and crop diversity: farmers’ perceptions and adaptation on the Bolivian Altiplano

Meldrum

Mijatović²,

Rojas

et al. 2017

Environ Dev Sustain

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Crop diversity is central to traditional risk management practices on the Andean Altiplano and may find renewed importance in adapting to climate change. This study explored the role of crop diversity in farmers' adaptation actions in eight Aymara communities on the northern Bolivian Altiplano. Using a combination of quantitative and qualitative methods, including multifactor analysis and a community resilience selfassessment, we investigated how farmers' use of diversity in adaptation is related to their perceptions of crop and variety tolerances and other environmental, social, and economic factors. Few crops and varieties were perceived as tolerant to increasingly intense and unpredictable drought, frost, hail, and pest and disease outbreaks. Some local crops and varieties were perceived as vulnerable to emerging conditions (e.g. oca, papalisa, isaño), whereas bitter potatoes and wild relatives of quinoa and cañahua were perceived as highly stress tolerant and provide food in harsh periods. A total 19% of households surveyed (N = 193) had introduced new crops or varieties-often disease resistant or early maturing-as an adaptive action. Introduction of commercial crops was a common adaptation action, reflecting farmers' response to warming temperatures and changing economic opportunities, but greater sensitivity of the introduced crops may cause maladaptation. Despite intensification of cropping systems, households continue to maintain a median four potato varieties with different tolerance traits, yet this risk management practice was not perceived as adaptation. Strengthening resilience will require a combination of actions, including maintaining and expanding crop portfolios and restoring soil and ecosystem health, using both traditional and innovative approaches.

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FactoMineR: AnRPackage for Multivariate Analysis

Cited by 7,730 publications

References 7 publications

Characterisation of camel breeding practices in the Ansongo Region, Mali

Characterisation of camel breeding practices in the Ansongo Region, Mali

Comunidades ribeirinhas como forma socioespacial de expressão urbana na Amazônia: uma tipologia para a região do Baixo Tapajós (Pará-Brasil)

Climate change and crop diversity: farmers’ perceptions and adaptation on the Bolivian Altiplano

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