he art of r programming a tour of statistical software design

... hist(z,breaks=12) would draw a histogram of the data set z with 12 bins. You can also create nicer labels, make use of color, and make many other changes to create a more informative and eye- appealing ... sophisticated software applications, R s behavior can be customized using startup files. In addition, R can save all or part of a session, such as a record of what you did, to an output file. If there are ... console. As a quick example, consider a standard normal distribution—that is, with mean 0 and variance 1. If a random variable X has that distribution, then its values are centered around 0, some negative,...

Ngày tải lên: 23/03/2014, 05:24

... Senate as reasons of the removal above referred to: The Director of the Mint is the head of one of the most important of the bureaus of the Treasury Department, to which are attached duties of a highly ... son of the latter named, was graduated at Yale in 1824, was ordained to the Presbyterian ministry in 1829, and in the same year married Ann Neal, daughter of a Baltimore merchant of Irish birth. ... completion and maintenance of the Deseret University and the education of the deaf mutes therein. It also appropriated for the support of the Territorial insane asylum, as well as the salaries of Territorial...

Ngày tải lên: 31/03/2014, 11:20

... [33]. Weightbearing antero-posterior (AP), lateral, and femo- ral-patellar in 30° flexion radiographs were taken of both knees (ipsi- and contralateral) at 10 years. The radio- graphs were taken under standardised ... criteria. These patients were graded as normal (A) , nearly normal (B), abnormal (C) or severely abnormal (D). The final grade is determined by the worst score in any of the four principal categories: ... osteoarthritis at a minimum of ten years after reconstruction of the anterior cruciate ligament Cor P van der Hart* 1 , Michel PJ van den Bekerom 2 and Thomas W Patt 3 Address: 1 Department of...

Ngày tải lên: 20/06/2014, 01:20

... harvested fibular graft was placed in ipsilateral forearm and radiocarpal ligaments were repaired to lat- eral collateral ligament. After reduction of newly formed fibula carpal joint, fibular ... vascularity of fibular graft forcing it to act essentially as a nonvascular graft [16]. Moreover, long surgical time and unavailability of required expertise of a vascular surgeon are further drawbacks ... to be curative, it is seldom warranted in a tumor that rarely metastasizes. TherecurrencerateforprimarytreatmentofGCTis relatively higher for curettage or extended curettage as compared to en...

Ngày tải lên: 20/06/2014, 04:20

... ipsilateral forearm and radiocarpal ligaments were repaired to lat- eral collateral ligament. After reduction of newly formed fibula carpal joint, fibular diaphysis was reduced to remaining proximal ... phosphatase were also determined to rule out hyperparathyroidism. Procedure Patients were operated under general anaesthesia and ipsilateral leg, arm and iliac crest were prepped and draped appropriately. ... as a nonvascular graft [16]. Moreover, long surgical time and unavailability of required expertise of a vascular surgeon are further drawbacks which pre- clude the use of vascularised fibular...

Ngày tải lên: 20/06/2014, 07:20

Ngày tải lên: 10/08/2014, 23:20

... choice of the appropriate auxiliary variable can vary depending on the target variable. J (1955) recommended, for example, the branch cross- sectional area as the auxiliary variable for estimating ... at the base of the segment, a proxy of the volume of that part of the branch, as the auxiliary variable. Each path was terminated when a diameter of 5 cm or less was encountered. e same auxiliary ... deletion of larger segments e stratification of the crown means a formation of at least two strata the size and variability of which are important for the precision of the estimate. e larger the...

Ngày tải lên: 07/08/2014, 03:22

... internal membranes that partition the cell into organelles ã Plant and animal cells have most of the same organelles BioFlix: Tour Of An Animal Cell BioFlix: Tour Of An Animal Cell BioFlix: Tour ... of an image depends on – Magnification, the ratio of an object’s image size to its real size – Resolution, the measure of the clarity(trong sang,ro rang) of the image, or the minimum distance ... • The logistics(ve hau can) of carrying out cellular metabolism(su trao doi chat) sets limits on the size of cells ã The surface area to volume ratio of a cell is critical ã As the surface area...

Ngày tải lên: 09/07/2014, 19:20

... http://www.medsci.org 404 to trauma, infection, intrauterine catastrophes 16 or head surgery 17 . In our case, the lack of a previous history of trauma, infection and head surgery leads us to believe that ... other hand, are pre- sent in approximately 25% of MZ. Therefore, we suggest that the reported incidence rate of mir- ror-imaging of AC is probably underestimated. To improve the diagnosis rate, ... accumulation of CSF surrounded by an arachnoid membrane. Vernooij et al. 15 found that AC has a prevalence of approximately 1% in the normal population. There are two hypotheses: pri- mary anomalies...

Ngày tải lên: 25/10/2012, 11:00

... statistics of the IT Industry Department, the US is a big software exporter but its import of software accounts for 30% of the total spending for software of the world and its payment for outsourcing ... countries have dominated the whole overseas IT Industry business market and accounts for the majority of the market share in their specialized industry. In the map of the Asian software outsourcing, ... fewer than 70%. The annual growth rate of software industry will reach about 35-40% in the 2006-2008 period and then stay at 25-30% in later years. 2.2. Prospects of Vietnam software outsourcing Vietnam...

Ngày tải lên: 27/10/2012, 16:41

... final vertical state of the grain. Similarly, the activation energy for a flip reads h = b − 1, where b = √ 1 + a 2 is the diagonal length of a grain. r The grain flips from vertical to horizontal ... simulations of shaken spheres [61, 62, 130] confirm the first- order, irreversible nature of the transition. As mentioned in an earlier chapter, the density may attain values that are substantially higher ... there is a strong tendency to prefer one of the two orientations on stability grounds. In a spirit of generalisation, we say therefore that when grains are very asymmetrically shaped, and there...

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Ngày tải lên: 14/12/2013, 00:41