我有一个看起来像这样的CSV文件。它是矩阵形式,其中单元格A1是空的。我希望在Tableau中将其显示为this
a1,a2,a3
a1,1,0.2,0.3
a2,0.3,1,0.5
a3,0.6,0.7,1
如何在画面中构建此图来显示矩阵?
我尝试将measure name
放在行和列字段中,measure values
放在marks
文本框中,但我最终得到的对角线值不是我想要的。
答案 0 :(得分:0)
首先以表格的形式构建数据。
Tableau(以及大多数工具)的结构良好的CSV文件具有标记每列的单个标题行(因此跳过标题行中的第一个单元格是个问题)。然后,后面的每个数据行仅包含由列分隔的每个字段中的值(因此不应存在前导行标签)
在关系表中,订单并不重要。表中的行形成一个集合,而不是矩阵。
所以你的CSV应该看起来更接近
@interface QueueController : NSObject<NSURLSessionDelegate>
@property(nonatomic, weak) NSObject<QueueControllerDelegate>* delegate;
@property(atomic, strong) NSURLSession* session;
@property(nonatomic) NSURLSessionConfiguration* configuration;
+ (QueueController*)sharedInstance;
@end
@implementation QueueController {
- (void)application:(UIApplication *)application
handleEventsForBackgroundURLSession:(NSString *)identifier
completionHandler:(void (^)(void))completionHandler {
//...
}
TransferUploadModel:
@interface TransferUploadModel : TransferModel <NSURLSessionTaskDelegate,
NSURLSessionDataDelegate>
//...
@end
//Note TransferModel is a subclass of NSOperation
@implementation TransferUploadModel
- (id)initWithMedia:(MediaItem*)mediaItem_
withTransferType:(TransferType)transferType_
andWiths3Path:s3Path_
andWiths3file_name:s3file_name_
andWithNSURLSession:session {
}
- (void)main {
//NSOperation override
}
//
// Transfer upload started
//
- (void)uploadMedia {
/**
* Fetch signed URL
*/
AWSS3GetPreSignedURLRequest *getPreSignedURLRequest = [AWSS3GetPreSignedURLRequest new];
getPreSignedURLRequest.bucket = BUCKET_NAME;
getPreSignedURLRequest.key = @"mypic.jpeg";
getPreSignedURLRequest.HTTPMethod = AWSHTTPMethodPUT;
getPreSignedURLRequest.expires = [NSDate dateWithTimeIntervalSinceNow:3600];
// Important: must set contentType for PUT request
getPreSignedURLRequest.contentType = self.content_type;
NSLog(@"headers: %@", getPreSignedURLRequest);
/**
* Upload the file
*/
[[[AWSS3PreSignedURLBuilder defaultS3PreSignedURLBuilder] getPreSignedURL:getPreSignedURLRequest] continueWithBlock:^id(AWSTask *task) {
if (task.error) {
NSLog(@"Error: %@", task.error);
} else {
NSURL* presignedURL = task.result;
NSLog(@"upload presignedURL is: \n%@", presignedURL);
NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:presignedURL];
request.cachePolicy = NSURLRequestReloadIgnoringLocalCacheData;
[request setHTTPMethod:@"PUT"];
[request setValue:self.content_type forHTTPHeaderField:@"Content-Type"];
@try {
self.nsurlSessionUploadTask = [self.nsurlSession uploadTaskWithRequest:request
fromFile:self.mediaCopyURL];
[self.nsurlSessionUploadTask resume];
//
// Delegates don't fire after this...
//
} @catch (NSException* exception) {
NSLog(@"exception creating upload task: %@", exception);
}
}
return nil;
}];
}
//
// NSURLSessionDataDelegate : didReceiveData
//
- (void)URLSession:(NSURLSession *)session
dataTask:(NSURLSessionDataTask *)dataTask
didReceiveData:(NSData *)data {
NSLog(@"...");
}
//
// Initial response from server with headers
//
- (void)URLSession:(NSURLSession *)session
dataTask:(NSURLSessionDataTask *)dataTask
didReceiveResponse:(NSURLResponse *)response
completionHandler:
(void (^)(NSURLSessionResponseDisposition disposition))completionHandler {
NSLog(@"response.description:%@", response.description);
completionHandler(NSURLSessionResponseAllow);
}
//
// Upload transfer in progress
//
- (void)URLSession:(NSURLSession *)session
task:(NSURLSessionUploadTask *)task
didSendBodyData:(int64_t)bytesSent
totalBytesSent:(int64_t)totalBytesSent
totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend {
@try {
NSLog(@"...");
} @catch (NSException *exception) {
NSLog(@"%s exception: %@", __PRETTY_FUNCTION__, exception);
}
}
//
// Upload transfer completed
//
- (void)URLSession:(NSURLSession *)session
task:(NSURLSessionTask *)task
didCompleteWithError:(NSError *)error {
NSLog(@"...");
} // end URLSession:session:task:error
@end
通常,Tableau的主要用途是显示数据的汇总摘要,而不是显示每个单独的数据行。因此,您可以将measure_names放在文本或标签架上的列和measure_values上,以获取每个度量的摘要(默认为总和)
如果您只想查看表中的基础数据行以进行诊断,最简单的方法是使用视图数据按钮或菜单命令。
如果要在表格中构建显示所有数据(无需汇总)的可视化,您有两种方法可以使用。最简单的方法是,如果数据中有唯一的主键,则可以将其放在行架上,以便为数据中的每一行输入一行。
如果您的数据行没有主键,则可以从“分析”菜单中关闭聚合度量,但随后您将在每个表格单元格中看到多个值。然后,为了在数据中为每一行输入一行,将计算索引()放在行架上并将其更改为离散。