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Thread::tdlen

Thread::tdlen

Details

  • This message is generated when a threading operation is used with expressions that do not have the same length.
  • Operations with the Listable attribute, such as Plus and Times, automatically thread over arguments that are lists.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[Thread::tdlen].

Examples

Basic Examples  (2)

An error occurs because the argument expressions in the test function do not have the same length:

Wolfram Language code: Thread[test[{1, 2}, {7, 8, 9}]]

This shows a valid argument in Thread:

Wolfram Language code: Thread[test[{1, 2, 3}, {7, 8, 9}]]

This message can also be generated when functions with the Listable attribute are used with list arguments that do not all have the same length:

Wolfram Language code: Attributes[Plus]
Wolfram Language code: 10 + {1, 2} + {7, 8, 9}

This example shows addition threaded over lists that have the same length:

Wolfram Language code: 10 + {1, 2, 3} + {7, 8, 9}