Как создать тепловую карту с использованием данных временных рядов в R

Я пытался нарисовать тепловую карту с помощью ggstructure. Я не против использования базовой графики, если смогу получить несколько указателей. Я хочу, чтобы тепловая карта выглядела примерно так:

http://www.vistadatavision.com/uploads/images/reports/intensity_plot_1.PNG

Мне не удалось продвинуться дальше, чем ввести ggstructure (df3) а затем почесываю голову над ошибкой - которая, кажется, связана с тем, что ей не нравятся данные о дате / времени?

Вот «dput» для двухнедельной выборки данных с 10-минутными интервалами. edit: В конце концов, у меня было достаточно места только на 4 дня. Надеюсь, этого будет достаточно.

Любые указатели приветствуются.

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"11:10:00", "11:20:00", "11:30:00", "11:40:00", "11:50:00", "12:00:00", 
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