Actualizar y guardar

Imagina que estás entrenando un modelo de Machine Learning para reconocer escenas oceánicas. Quieres que el modelo entienda que los océanos no solo se asocian a colores brillantes y veraniegos, así que te aseguras de incluir también imágenes de océanos con mal tiempo o luz de atardecer. Puede que tengas que transformar manualmente algunas imágenes para equilibrar los datos, así que tu tarea es oscurecer la escena oceánica de Monet rgb_array.

Recuerda del video que el blanco se asocia con el valor RGB máximo de 255, mientras que los colores más oscuros se asocian con valores más bajos. numpy está cargado como np, y el rgb_array 3D de Monet que cargaste en el ejercicio anterior está disponible.

Este ejercicio forma parte del curso

Introducción a NumPy

Ejercicio interactivo práctico

Prueba este ejercicio y completa el código de muestra.

# Reduce every value in rgb_array by 50 percent
darker_rgb_array = ____

Editar y ejecutar código

Este ejercicio forma parte del curso

Introducción a NumPy

PrincipianteNivel de habilidad

4.8+

Comienza el curso gratis

Meet the incredible NumPy array! Learn how to create and change array shapes to suit your needs. Finally, discover NumPy's many data types and how they contribute to speedy array operations.

Exercise 1: Introducing arrays Exercise 2: Your first NumPy array Exercise 3: Creating arrays from scratch Exercise 4: A range array Exercise 5: Array dimensionality Exercise 6: 3D array creation Exercise 7: The fourth dimension Exercise 8: Flattening and reshaping Exercise 9: NumPy data types Exercise 10: The dtype argument Exercise 11: Anticipating data types Exercise 12: A smaller sudoku game

Sharpen your NumPy data wrangling skills by slicing, filtering, and sorting New York City’s tree census data. Create new arrays by pulling data based on conditional statements, and add and remove data along any dimension to suit your purpose. Along the way, you’ll learn the shape and dimension compatibility principles to prepare for super-fast array math.

Exercise 1: Indexing and slicing arrays Exercise 2: Slicing and indexing trees Exercise 3: Stepping into 2D Exercise 4: Sorting trees Exercise 5: Filtering arrays Exercise 6: Filtering with masks Exercise 7: Fancy indexing vs. np.where()Exercise 8: Creating arrays from conditions Exercise 9: Adding and removing data Exercise 10: Compatible or not?Exercise 11: Adding rows Exercise 12: Adding columns Exercise 13: Deleting with np.delete()

Leverage NumPy’s speedy vectorized operations to gather summary insights on sales data for American liquor stores, restaurants, and department stores. Vectorize Python functions for use in your NumPy code. Finally, use broadcasting logic to perform mathematical operations between arrays of different sizes.

Exercise 1: Summarizing data Exercise 2: Sales totals Exercise 3: Plotting averages Exercise 4: Cumulative sales Exercise 5: Vectorized operations Exercise 6: Tax calculations Exercise 7: Projecting sales Exercise 8: Vectorizing .upper()Exercise 9: Broadcasting Exercise 10: Broadcastable or not?Exercise 11: Broadcasting across columns Exercise 12: Broadcasting across rows

NumPy meets the art world in this final chapter as we use image data from a Monet masterpiece to explore how you can use to augment image data. You’ll use flipping and transposing functionality to quickly transform our masterpiece. Next, you’ll pull the Monet array apart, make changes, and reconstruct it using array stacking to see the results.

Exercise 1: Guardar y cargar arrays Exercise 2: Cargar archivos .npy Exercise 3: Obtener ayuda Exercise 4: Actualizar y guardar

Ejercicio actual

Exercise 5: Acróbatas de arrays Exercise 6: Aumentar a Monet Exercise 7: Transponer tu obra maestra Exercise 8: Apilado y división Exercise 9: Dividir y apilar en 2D Exercise 10: Dividir datos RGB Exercise 11: Apilar datos RGB Exercise 12: ¡Enhorabuena!