Conteúdo do Curso
Preprocessing Data
Preprocessing Data
1. Data Exploration
3. Data Validation
4. Normalization & Standardization
5. Data Encoding
Missing and Wrong Data
As you already know, it is possible that raw data can contain some dirty data. It can be:
- NaN: undefined or missing data.
- empty strings.
- infinite: very large data.
- incorrect data: for example, 'Female' in the Price column, that contains numeric data (this value could be stored into the wrong cell accidentally). You may find impossible values of the user's age, for example, if this value should be entered by him manually (like -1, 110, 0, etc.).
- outliers: critically small or big values(for example, 250 cm in the Height column, or 112 yrs in the Age column), usually in a small amount. They may affect your result of analysis or model weights, so sometimes it makes sense to remove them.
Let's learn how to 'clean' your data and not to lose some useful info.
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Seção 2. Capítulo 1
Missing and Wrong Data
As you already know, it is possible that raw data can contain some dirty data. It can be:
- NaN: undefined or missing data.
- empty strings.
- infinite: very large data.
- incorrect data: for example, 'Female' in the Price column, that contains numeric data (this value could be stored into the wrong cell accidentally). You may find impossible values of the user's age, for example, if this value should be entered by him manually (like -1, 110, 0, etc.).
- outliers: critically small or big values(for example, 250 cm in the Height column, or 112 yrs in the Age column), usually in a small amount. They may affect your result of analysis or model weights, so sometimes it makes sense to remove them.
Let's learn how to 'clean' your data and not to lose some useful info.
Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixoTudo estava claro?
Obrigado pelo seu feedback!
Seção 2. Capítulo 1
Missing and Wrong Data
As you already know, it is possible that raw data can contain some dirty data. It can be:
- NaN: undefined or missing data.
- empty strings.
- infinite: very large data.
- incorrect data: for example, 'Female' in the Price column, that contains numeric data (this value could be stored into the wrong cell accidentally). You may find impossible values of the user's age, for example, if this value should be entered by him manually (like -1, 110, 0, etc.).
- outliers: critically small or big values(for example, 250 cm in the Height column, or 112 yrs in the Age column), usually in a small amount. They may affect your result of analysis or model weights, so sometimes it makes sense to remove them.
Let's learn how to 'clean' your data and not to lose some useful info.
Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixoTudo estava claro?
Obrigado pelo seu feedback!
As you already know, it is possible that raw data can contain some dirty data. It can be:
- NaN: undefined or missing data.
- empty strings.
- infinite: very large data.
- incorrect data: for example, 'Female' in the Price column, that contains numeric data (this value could be stored into the wrong cell accidentally). You may find impossible values of the user's age, for example, if this value should be entered by him manually (like -1, 110, 0, etc.).
- outliers: critically small or big values(for example, 250 cm in the Height column, or 112 yrs in the Age column), usually in a small amount. They may affect your result of analysis or model weights, so sometimes it makes sense to remove them.
Let's learn how to 'clean' your data and not to lose some useful info.
Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixoSeção 2. Capítulo 1
Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo