save

问题 In my program i allow the user to enter some text which then gets put on top of an image using the graphics.DrawString() method. When i then go to save this image, it saves it without the text. How can i save both as one image? I have seen a few examples but none of which have helped. private void txtToolStripMenuItem_Click(object sender, System.EventArgs e) { Rectangle r = new Rectangle(535, 50, original_image.Width, original_image.Height); Image img = Image.FromFile("C:\\PCB.bmp"); Bitmap

问题 I have created a plot from a very large vector (magnitude of 10^7). The problem with the usual way of saving the plot as a pdf file is that the pdf file comes out as a very large file of around 10MB. I don't want such a large size for a simple time series plot. How do I save the plot such that the size is small enough to be at most 100kilobytes? 回答1: baptiste is on the right track with their suggestion of png for a nice raster type plot. In contrast to Jdbaba's suggestion of copying the open

问题 I want to save multiple plots as png using a loop. Unfortunately the loop doesn't seem to work, as the saving and plotting of one single plot works but if I do it within the loop, nothing is saved. I don't receive a error message either. Just nothing happens. Here is the code that works: name = main_emo[i] mypath=file.path("/Users/Jasmin/Documents/Psychologie/Master/Masterarbeit/Working directory", name) png(mypath) qplot(x_emo,y_emo, main = main_emo[i]) + geom_errorbar(aes(x=x_emo, ymin=y

问题 I want to pass a list of variables to saveRDS() to save their values, but instead it saves their names: variables <- c("A", "B", "C") saveRDS(variables, "file.R") it saves the single vector "variables". I also tried: save(variables, "file.RData") with no success 回答1: You need to use the list argument of the save function. EG: var1 = "foo" var2 = 2 var3 = list(a="abc", z="xyz") ls() save(list=c("var1", "var2", "var3"), file="myvariables.RData") rm(list=ls()) ls() load("myvariables.RData") ls()

问题 Below are my JSON script and html codes What i need is if (str="No Coupon") save the state of JSON and delete entire value from it and reload JSON with updated value on browser / options.coupon = undefined; // options = JSON.parse(JSON.stringify(options)); delete options.coupon[3] I tried with above codes and few other to delete it but the values show after refresh.Could anyone help me to fix it ? const options = [{ "country": "First", "coupon": ["1", "10", "11"] }, { "country": "Second",

问题 Below are my JSON script and html codes What i need is if (str="No Coupon") save the state of JSON and delete entire value from it and reload JSON with updated value on browser / options.coupon = undefined; // options = JSON.parse(JSON.stringify(options)); delete options.coupon[3] I tried with above codes and few other to delete it but the values show after refresh.Could anyone help me to fix it ? const options = [{ "country": "First", "coupon": ["1", "10", "11"] }, { "country": "Second",

问题 I am using Mongoose npm module to manage mongodb. This is schema of mongodb collection what I am going to update. var UserSchema = new Schema({ username: { type: String, unique: true, required: true }, email: { type: String, unique: true, required: true }, cards: [] }); module.exports = mongoose.model('User', UserSchema); inside post request, here req is request object of post request. and res is response object. User.findById(userID).exec(function (err, doc) { let cardInfo = req.cardInfo let

问题 I am using Mongoose npm module to manage mongodb. This is schema of mongodb collection what I am going to update. var UserSchema = new Schema({ username: { type: String, unique: true, required: true }, email: { type: String, unique: true, required: true }, cards: [] }); module.exports = mongoose.model('User', UserSchema); inside post request, here req is request object of post request. and res is response object. User.findById(userID).exec(function (err, doc) { let cardInfo = req.cardInfo let

问题 I want to users can change and save the theme color in my app. However, I have no ideas how to load the saved theme color when the app start running. For example, I want to load the saved theme color directly in the comment place below. I tried SharedPreference. However the SharedPreference instance need to run with await . It seems can't be used here. Is there any way I can load saved theme here directly instead of using setState or something like it？ import 'package:flutter/material.dart';

问题 I want to users can change and save the theme color in my app. However, I have no ideas how to load the saved theme color when the app start running. For example, I want to load the saved theme color directly in the comment place below. I tried SharedPreference. However the SharedPreference instance need to run with await . It seems can't be used here. Is there any way I can load saved theme here directly instead of using setState or something like it？ import 'package:flutter/material.dart';