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R get all categories in column - Stack Overflow

I have a large Dataset (dataframe) where I want to find the number and the names of my cartegories in a column. For example my df was like that: A B 1 car 2 car 3 bus 4 car 5 plane 6 plane 7 plane 8 plane 9 plane 10 train I would want to find : car bus plane train 4 How would I do that? r categories datacolumn. share | improve this question | follow | asked Sep 2 '17 at 20:17. user3443063 ...

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aggregate function | R Documentation

Details. aggregate is a generic function with methods for data frames and time series.. The default method, aggregate.default, uses the time series method if x is a time series, and otherwise coerces x to a data frame and calls the data frame method. aggregate.data.frame is the data frame method. If x is not a data frame, it is coerced to one, which must have a non-zero number of rows.

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Aggregates | AboutCivil.Org

Aggregates are the most mined material in the world. Construction aggregate is a broad category of granular raw material of different sizes (sand, gravel, crushed stone, slag, recycled concrete etc) used in construction. Aggregate can be used in a number of ways in construction. In roads and railway ballast the aggregates are used to resist the overall (static as well as

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Aggregates - Portland Cement Association

Aggregates, which account for 60 to 75 percent of the total volume of concrete, are divided into two distinct categories--fine and coarse. Fine aggregates generally consist of natural sand or crushed stone with most particles passing through a 3/8-inch sieve. Coarse aggregates are any particles greater than 0.19 inch, but generally range between 3/8 and 1.5 inches in diameter. Gravels ...

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On Aggregate Grading

57 and 8 per ASTM C33) and fine aggregate by volume. The NWG aggregates were developed by combining different proportions of size number 57 coarse aggregate and fine aggregates. The CF and 8-18 charts for the WG and NWG combined aggregates are plotted in Fig. 1 and 2, respectively. Combined aggregate void content was determined according to ASTM C29, except that the combined aggregates .

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fine aggregate Archives – Being Construction

Browsing Category. fine aggregate. 1 post Read More. 42 views; 4 minute read; cement; Checklist; fine aggregate; reinforcement; Field check for Cement, Aggregate, reinforcement, and water. By BeingConstruction; January 12, 2020; Here we will discuss the field check for Cement, Aggregate, reinforcement, and water which is used for preparing. Read More 0. 0. 0. Featured Posts. 1 Field .

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Sand Fine Aggregate - Category Page 1 - .

Find all the articles of Aggregates and Sand Fine Aggregate.

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1 Abbreviations for Fine Aggregate Angularity

1 ways to abbreviate Fine Aggregate Angularity updated 2020. How to abbreviate Fine Aggregate Angularity? The most popular abbreviation for Fine Aggregate Angularity is: FAA

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Fineness Modulus of Aggregates: The Inside .

Fine aggregate FM's in the upper end of the spectrum, closer to 3.0, have been noted to produce concrete with good strength and workability in mixes with high cement contents. To sum up, fineness modulus (FM) is not only required for complete, workable concrete mix designs, but it is also a tool to use in evaluating aggregate gradations, adjusting proportions and controlling the properties ...

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Sand Fine Aggregate - Category Page 1 - .

Find all the articles of Aggregates and Sand Fine Aggregate.

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Categorical data — pandas 1.0.5 documentation

Categorical data¶. This is an introduction to pandas categorical data type, including a short comparison with R's factor.. Categoricals are a pandas data type corresponding to categorical variables in statistics. A categorical variable takes on a limited, and usually fixed, number of possible values (categories; levels in R).Examples are gender, social class, blood type, country affiliation ...

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What is the difference between fine aggregate .

Fine Aggregate : If the aggregate size is less than 4.75mm, then it is called as Fine aggregate. The minimum size of fine aggregate is 0.075mm is preferred for concreting works Coarse Aggregate : If the aggregate size is more than 4.75mm, then it ...

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Classification of Aggregates: Grain Size, Density, .

That is, aggregates which can be passed through a number 4 sieve, with a mesh size of 4.75mm. Fine aggregates include things such as sand, silt and clay. Crushed stone and crushed gravel might also fall under this category. Typically, fine aggregates are used to improve workability of a concrete mix. Coarse aggregates measure above the 4.75mm limit. These are more likely to be natural stone or ...

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Different Types & Sizes of Aggregate for .

11.08.2018 · Fine Aggregates are usually sand or crushed stone that are less than 9.55mm in diameter. When the aggregate is sieved through 4.75mm sieve, the aggregate passed through it. Natural sand is generally used as fine aggregate, silt, stone dust and clay also come under this category. The purpose of the fine aggregate is to fill the voids in the coarse aggregate and to act as a workability agent ...

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Aggregates | AboutCivil.Org

Aggregates are the most mined material in the world. Construction aggregate is a broad category of granular raw material of different sizes (sand, gravel, crushed stone, slag, recycled concrete etc) used in construction. Aggregate can be used in a number of ways in construction. In roads and railway ballast the aggregates are used to resist the overall (static as well as

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Text Search — MongoDB Manual

Text Index¶. MongoDB provides text indexes to support text search queries on string content. text indexes can include any field whose value is a string or an array of string elements.. To perform text search queries, you must have a text index on your collection. A collection can only have one text search index, but that index can cover multiple fields.. For example you can run the following ...

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r - How to sum a variable by group - Stack Overflow

require(reshape) recast(x, Category ~ ., fun.aggregate=sum) share | improve this answer | follow | edited Nov 2 '09 at 9:44. answered Nov 2 '09 at 9:38. Rob Hyndman Rob Hyndman. 24.5k 6 6 gold badges 57 57 silver badges 74 74 bronze badges. add a comment | 19. 0. While I have recently become a convert to dplyr for most of these types of operations, the sqldf package is still really nice (and ...

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Fine Aggregate | Fine Aggregates Specification | .

Fine Aggregate may have more impact on the strength of the building than cement. This article explains the guidelines to check the quality of fine aggregate and purchasing guidelines: Read more >> Purchasing Guidelines for Fine Aggregate/ Coarse Sand : There should be no silt contents in Coarse Sand as the suppliers try to charge much amount by supplying the material of lowe quality. Read more ...

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What is Aggregates | Aggregate Definition & its .

(i) Fine Aggregates. In the Fine Aggregates, the grain-size lies between 4.75 mm and 0.15 mm. In other words, these pass-through from sieve with the mesh size of 4.75 mm and are retained on a sieve of 0.15 mesh size. Sand is the most universally available natural Fine Aggregate.

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4 Aggregate Specifications and Requirements

All fine aggregates used for HMA are required to be in accordance with ... is required to originate from a Category I source in accordance with ITM 203. The total blended aggregate from the fine and coarse aggregates, and recycled materials used in HMA are required to meet the fine aggregate angularity (FAA) requirements of Section 904.02(b). The procedure for determining the FAA value is ...

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Classification of Aggregate Based on Size, Shape, .

Classification Of Aggregate Aggregate classification. The classification of Aggregate is generally based on their geological origin, size, shape, unit, weight, etc. Aggregate is the major ingredient of concrete. Aggregate is derived from rocks. They are broadly divided into two categories i.e. fine and coarse aggregates.

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