numInstr = 2 nameInstr = ['Piano', 'Trumpet'] filenames = ['example_piano.wav', 'example_trumpet.wav'] matplotlib.rcParams.update({'font.size' : 20}) # Increase font size plt.figure(figsize=(18, 8))

这段代码定义了一些变量，用于表示乐器的数量、乐器名称和示例文件的名称，并且使用Matplotlib库设置了图形的字体大小和大小。具体来说，代码定义了变量numInstr，表示乐器的数量（这里是2），变量nameInstr，表示乐器的名称（这里是'Piano'和'Trumpet'），以及变量filenames，表示示例文件的名称（这里是'example_piano.wav'和'example_trumpet.wav'）。接下来，使用matplotlib.rcParams.update方法设置图形的字体大小为20。最后，使用plt.figure方法创建一个大小为18x8的图形，并将其存储在plt对象中，以便后续使用。

相关问题

NameError: name 'load_model' is not defined

对不起，我漏掉了一些代码。在使用`load_model`函数之前，需要从`keras.models`中导入`load_model`函数。修改代码如下：

import librosa
import numpy as np
import os
from keras.models import load_model

# 定义CQT的参数
cqt_params = {
    'hop_length': 512,
    'n_bins': 252,
    'bins_per_octave': 36,
    'sr': 22050,
    'fmin': 55,
    'normalize_magnitude': True
}

# 加载训练好的模型
model = load_model('instrument_classifier.h5')

# 定义标签
labels = ['bass', 'cello', 'clarinet', 'flute', 'guitar', 'organ', 'piano', 'saxophone', 'trumpet', 'violin']

# 定义测试音频文件夹路径
test_folder = './test/'

# 遍历测试文件夹内的所有音频文件
for filename in os.listdir(test_folder):
    # 加载音频文件
    audio, sr = librosa.load(test_folder + filename, sr=cqt_params['sr'])
    # 计算CQT
    cqt = np.abs(librosa.cqt(audio, **cqt_params))
    # 将CQT转换成模型所需的形状
    cqt = np.transpose(cqt)
    cqt = np.expand_dims(cqt, axis=0)
    # 使用模型进行预测
    prediction = model.predict(cqt)[0]
    # 打印预测结果
    predicted_label = labels[np.argmax(prediction)]
    print('Predicted label for', filename, ':', predicted_label)

这段代码将从`keras.models`中导入`load_model`函数，并使用该函数来加载训练好的模型。

create a class called Student. Every Student will contain a name (String) and an ArrayList<String> storing hobbies. Then, you will add all those students from the file into an ArrayList<Student>, with each Student having a separate name and ArrayList of hobbies. Here is an example file containing students (the first line will always represent yourself). NOTE: eventually, we will have a different file containing all our real names and hobbies so that we could find out with how many people each of us share the same hobby. Vitaly,table tennis,chess,hacking Sean,cooking,guitar,rainbow six Nolan,gym,piano,reading,video games Jack,cooking,swimming,music Ray,piano,video games,volleyball Emily,crochet,drawing,gardening,tuba,violin Hudson,anime,video games,trumpet Matt,piano,Reading,video games,traveling Alex,swimming,video games,saxophone Roman,piano,dancing,art Teddy,chess,lifting,swimming Sarah,baking,reading,singing,theatre Maya,violin,knitting,reading,billiards Amy,art,gaming,guitar,table tennis Daniel,video games,tennis,soccer,biking,trumpet Derek,cooking,flute,gaming,swimming,table tennis Daisey,video games,guitar,cleaning,drawing,animated shows,reading,shopping Lily,flute,ocarina,video games,baking Stella,roller skating,sudoku,watching baseball,harp Sophie,viola,ukulele,piano,video games Step 2. Sort the student list in the ascending order of student names and print them all on the screen

Sure, here is an example implementation in Java:

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;

public class Student {
    private String name;
    private ArrayList<String> hobbies;

    public Student(String name, ArrayList<String> hobbies) {
        this.name = name;
        this.hobbies = hobbies;
    }

    public String getName() {
        return name;
    }

    public ArrayList<String> getHobbies() {
        return hobbies;
    }

    public static void main(String[] args) {
        ArrayList<Student> students = new ArrayList<>();

        try (BufferedReader br = new BufferedReader(new FileReader("students.txt"))) {
            String line;
            while ((line = br.readLine()) != null) {
                String[] parts = line.split(",");
                String name = parts[0];
                ArrayList<String> hobbies = new ArrayList<>();
                for (int i = 1; i < parts.length; i++) {
                    hobbies.add(parts[i]);
                }
                students.add(new Student(name, hobbies));
            }
        } catch (IOException e) {
            System.err.format("IOException: %s%n", e);
        }

        Collections.sort(students, (s1, s2) -> s1.getName().compareTo(s2.getName()));

        for (Student student : students) {
            System.out.println(student.getName() + ": " + student.getHobbies());
        }
    }
}

This code reads the student data from a file called "students.txt" (in the same directory as the Java file), creates a `Student` object for each line, and stores them in an `ArrayList`. It then sorts the list by student name using a lambda expression, and finally prints out each student's name and hobbies using a `for` loop.